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NOTA DE PRENSA MIÉRCOLES 16 Parte de situación de los reactores nucleares de Fukushima Daiichi y Daini

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El complejo de Fukushima Daiichi cuenta con seis nucleares, pero tres estaban paradas antes del terremoto y posterior tsunami.

En el complejo Fukushima Daini, con cuatro nucleares, se trabaja en llevar a enfriamiento los reactores tras la parada provocada por el terremoto, hay problemas en la unidad 3.

(Fuente: empresa propietaria)

_____________________________________________________

Press Release (Mar 16,2011)
Impact to TEPCO’s Facilities due to Tohoku-Taiheiyou-Oki Earthquake (as of 10:00PM)

Due to the Tohoku-Taiheiyou-Oki Earthquake which occurred on March 11th

2011, TEPCO’s facilities including our nuclear power stations have been

severely damaged. We deeply apologies for the anxiety and inconvenience

caused.

Below is the status of TEPCO’s major facilities.

*new items are underlined

[Nuclear Power Station]

Fukushima Daiichi Nuclear Power Station:

Units 1 to 3: shutdown due to earthquake

(Units 4 to 6: outage due to regular inspection)

* The national government has instructed to evacuate for those local

residents within 20km radius of the site periphery and to remain indoors

for those local residents between 20km and 30km radius of the site

periphery.

* Unit 1

The explosive sound and white smoke was confirmed near Unit 1 when the

big quake occurred at 3:36pm, March 12th. We have started injection of

sea water at 8:20 pm and then boric acid into the reactor afterwards.

* Unit 2

At 1:25 pm, March 14th, since the Reactor Core Isolation Cooling System

has failed, it was determined that a specific incident stipulated in

article 15, clause 1 occurred (failure of reactor cooling function).

At 5:17 pm, while the water level in the reactor reached the top of

the fuel rod, we have restarted the water injection with the valve

operation.

At approximately 6:14 am, March 15th, the abnormal sound was confirmed

near the suppression chamber and the pressure inside the chamber

decreased afterwards. It was determined that there is a possibility that

something happened in the suppression chamber. While sea water injection

to the reactor continued, TEPCO employees and workers from other

companies not in charge of injection work started tentative evacuation to

a safe location.

Sea water injection to the reactor is still under operation.

* Unit 3

At 6:50 am, March 14th, while water injection to the reactor was under

operation, the pressure in the reactor containment vessel increased to

530 kPa. As a result, at 7:44 am, it was determined that a specific

incident stipulated in article 15, clause 1 occurred (abnormal increase

of the pressure of reactor containment vessel). Afterwards, the pressure

has gradually decreased (as of 9:05 am, 490 kPa).

At approximately 11:01 am, March 14th, an explosion followed by white

smoke occurred near Unit 3. 4 TEPCO employees and 3 workers from other

companies (all of them are conscious) have sustained injuries and they

were already dispatched to the hospital by ambulances.

As the temperature of water in the spent fuel pool rose, spraying water

by helicopters with the support of the Self Defense Force was considered,

however the works today have been cancelled.

* Unit 4

At approximately 6:00 am, March 15th, an explosive sound occurred and

the damage in the 5th floor roof of Unit 4 reactor building was

confirmed. At 9:38 am, the fire near the north-west part of 4th floor of

Unit 4 reactor building was confirmed. At approximately 11:00 am, TEPCO

employee confirmed that the fire was off.

At approximately 5:45 am, a TEPCO employee discovered a fire at

the northwest corner of the Nuclear Reactor Building. TEPCO immediately

reported this incident to the fire department and the local government

and proceeded with the extinction of fire. At approximately 6:15 am,

TEPCO staff confirmed at the site that there are no signs of fire.

* We will continuously endeavor to securing safety, and monitoring of

the surrounding environment.

Fukushima Daini Nuclear Power Station:

Units 1 to 4: shutdown due to earthquake

* The national government has instructed evacuation for those local

residents within 10km radius of the periphery.

* In order to achieve cold shutdown, reactor cooling function was

restored and cooling of reactors was conducted. As a result, all reactors

achieved cold shutdown: Unit 1 at 5:00 pm, March 14th, Unit 2 at 6:00 pm,

March 14th, Unit 3 at 0:15 pm, March 12th, Unit 4 at 7:15 am, March 16th.

* (Unit 1)

As it is confirmed that the temperature of the Emergency Equipment

Cooling Water System *1 has increased, at 3:20 pm, March 15th, we stopped

the Residual Heat Removal System (B) for the inspection. Subsequently,

failure was detected in the power supply facility associated with

the pumps of the Emergency Equipment Cooling Water System. At 4:25 pm,

March 15th, after replacing the power facility, the pumps and

the Residual Heat Removal System (B) have been reactivated.

* (Unit 4)

As it is confirmed that the pressure at the outlet of the pumps of

the Emergency Equipment Cooling Water System*1 has been decreased,

at 8:05 pm, March 15th, we stopped the Residual Heat Removal System (B)

for the inspection. Subsequently, failure was detected in the power

supply facility associated with the pumps of the Emergency Equipment

Cooling Water System. At 9:25 pm, March 15th, after replacing

the relevant facility, the pumps and the Residual Heat Removal System (B)

have been reactivated.

*1:emergency water system in which cooling water (pure water)

circulates which exchanged the heat with sea water in order to cool down

bearing pumps and/or heat exchangers etc.

Kashiwazaki Kariwa Nuclear Power Station:

Units 1, 5, 6, 7: normal operation

(Units 2 to 4: outage due to regular inspection)

[Thermal Power Station]

Hirono Thermal Power Station Units 2 and 4: shutdown due to earthquake

Hitachinaka Thermal Power Station Unit 1: shutdown due to earthquake

Kashima Thermal Power Station Units 2, 3, 5, 6: shutdown due

to earthquake

Ohi Thermal Power Station Unit 2: shutdown due to earthquake

Higashi-Ohgishima Thermal Power Station Unit 1: shutdown due

to earthquake

[Hydro Power Station]

* All the stations have been restored.

[Transmission System, etc.]

All substation failed due to the earthquake have been restored.

[Blackout in TEPCO’s Service Area]

Total of about 2,600 households are out of power (as of 22:00 today).

Tokyo: 0

Kanagawa Pref.: 0

Tochigi Pref.: 0

Chiba Pref.: 0

Saitama Pref: 0

Gunma Pref.: 0

Ibaraki Pref:2,561

Yamanashi Pref: 0

Shizuoka Pref: 0 (east of Fuji River)

[Supply and Demand Status within TEPCO’s Service Area to Secure Stable

Power Supply]

Backup supply from Shinshinano Conversion Station: 600MW

Backup supply from Sakuma Conversion Station: 300MW

Backup supply from Higashi Shimizu Conversion Station: 100MW

Backup supply from Kitahon Interconnection Facility: 600MW

Considering the critical balance of our power supply capacity and

expected power demand forward, in order to avoid unexpected blackout,

TEPCO has implemented rolling blackout (planned blackout alternates from

one area to another) since yesterday. We will make our utmost to secure

the stable power supply as early as possible.

For customers who will be subject to rolling blackout, please be prepared

for the announced blackout periods. Also for customers who are not

subject to blackouts, TEPCO appreciates your continuous cooperation in

reducing electricity usage by avoiding using unnecessary lighting and

electrical equipment.

[Others]

Please do NOT touch cut-off electric wires.

In order to prevent fire, please make sure to switch off the electric

appliances such as hair drier and to shut down the breaker of

distribution board when you leave your house.

For the customer who has in-house power generation, please secure fuel

for generator.


Press Release (Mar 14,2011)
Occurrence of a Specific Incident (Failure of reactor cooling function) Stipulated in Article 15, Clause 1 of the Act on Special Measures Concerning Nuclear Emergency Preparedness
At 2:46PM on March 11th 2011, the turbines and reactors of Fukushima
Daiichi Nuclear Power Station Unit 1 (Boiling Water Reactor, rated output
460 Megawatts) and Units 2 and 3 (Boiling Water Reactor, Rated Output 784
Megawatts) that had been operating at rated power automatically shutdown
due to the Tohoku-Chihou-Taiheiyou-Oki Earthquake.
(previously announced)

In response, water injection into Unit 2's reactor were being carried out
by the Reactor Core Isolation Cooling System. However, as the Reactor Core
Isolation Cooling System failed today, it was determined that a specific
incident (failure of reactor cooling function) stipulated in article 15,
clause 1 has occurred at 1:25 pm today.
Press Release (Mar 14,2011)
White smoke around the Fukushima Daiichi Nuclear Power Station Unit 3 (2nd release)
At approximately 11:01am, an explosive sound followed by white smoke
occurred at the reactor building of the Unit 3. It was believed to be a
hydrogen explosion.

According to the parameter, it is estimated that the reactor containment
vessel remains intact. However, the status of the plant and the impact of
radioactive materials to the outside environment are presently under
investigation. (previously announced)

As of 12:00 am, 4 TEPCO employees and 2 workers of related companies have
sustained injuries (all of them are conscious) and ambulances are on
their way to care for them.

As of 11:44 am, the measured value of radiation dose near MP6 is 20μSv/h
and the radiation level remains stable. 

TEPCO continues to take all measures to restore the safety and security
of the site and are monitoring the site's immediate surroundings.
Press Release (Mar 14,2011)
White smoke around the Fukushima Daiichi Nuclear Power Station Unit 3
At approximately 11:01am, an explosive sound followed by white smoke
occurred at the reactor building of the Unit 3. It was believed to be a
hydrogen explosion.

According to the parameter, it is estimated that the reactor containment
vessel remains intact. However, the status of the plant and the impact
of radioactive materials to the outside environment are presently under
investigation. 

Some workers have sustained injuries. Ambulances are on their way to care
for them.

TEPCO continues to take all measures to restore the safety and security of
the site and are monitoring the site's immediate surroundings.

________________________________

Press Release (Mar 13,2011)
Impact to TEPCO’s Facilities due to Miyagiken-Oki Earthquake (as of 3:00PM)

Below is major impact to TEPCO’s facilities due to the Miyagiken-Oki

Earthquake that occurred yesterday at 2:46PM.

*new items are underlined

[Nuclear Power Station]

Fukushima Daiichi Nuclear Power Station:

Units 1 to 3: shutdown due to earthquake

Units 4 to 6: outage due to regular inspection

* The national government has instructed evacuation for those local

residents within 20km radius of the site periphery.

* The value of radioactive material (iodine, etc) is increasing according to the monitoring car at the site (outside).

* Since the amount of radiation at the boundary of the site exceeds the limits, we decide at 4:17PM, Mar 12 and we have reported and/or noticed the government agencies concerned to apply the clause 1 of the Article 15 of the Radiation Disaster Measure at 5PM, Mar 12. The radiation dose at the monitoring post decreased once. Today, the measured value revamped and the radiation dose measured at site boundary exceeded the limiting value again. As such, at 8:56AM, today, it was determined that a specific incident

stipulated in article 15, clause 1 occurred and at 09:01AM, today, notified accordingly.

After that, the measured value by the monitoring car decreased once, however the value revamped and the radiation dose measured at site boundary exceeded the limitation again. As such, at 2:15PM, today, it was determined that a specific incident stipulated in article 15, clause 1 occurred and at 02:23PM, today, notified accordingly.

* In addition, a vertical earthquake hit the site and big explosion has happened near the Unit 1 and smoke breaks out around 3:36PM, Mar 12th.

* Unit 1: We started injection of sea water into the reactor core at 8:20PM, Mar 12 and then boric acid subsequently. We are coordinating with the relevant authorities and departments as to how to cool down water in the spent nuclear fuel pool.

* Unit 2: Reactor has been shut down and Reactor Core Isolation Cooling

System has been injecting water to the reactor. Current reactor water level is lower than normal level, but the water level is steady. After fully securing safety, we are preparing to implement a measure to reduce the pressure of the reactor containment vessels under the instruction of the national government. To do so, we operated the vent valve and completed the operation at 11:00AM, Mar 13.

* Unit 3: High Pressure Coolant Injection System automatically stopped. We endeavored to restart the Reactor Core Isolation Cooling System but failed.

Also, we could not confirm the water inflow of Emergency Core Cooling System.

As such, we decided at 5.10AM, Mar 12, and we reported and/or noticed the government agencies concerned to apply the clause 1 of the Article 15 of the Radiation Disaster Measure at 5:58AM, Mar 13.

In order to fully secure safety, we operated the vent valve to reduce the pressure of the reactor containment vessels (partial release of air containing radioactive materials) and completed the procedure at 8:41AM, Mar 13 (successfully completed at 09:20AM, Mar 13. After that, we began injecting water containing boric acid that absorbs neutron into the reactor by the fire pump from 09:25AM, Mar 13.

Taking account of the situation that the water level within the pressure vessel did not rise for a long time and the radiation dose is increasing, we cannot exclude the possibility that the same situation occurred at Unit 1 on Mar 12 will occur. We are considering the countermeasure to prevent that.

* We continue endeavoring to secure the safety that all we can do and

monitoring the periphery.

Fukushima Daini Nuclear Power Station:

Units 1 to 4: shutdown due to earthquake

* The national government has instructed evacuation for those local

residents within 10km radius of the periphery.

* At present, we have decided to prepare implementing measures to reduce the pressure of the reactor containment vessel (partial discharge of air containing radioactive materials) in order to fully secure safety.

These measures are considered to be implemented in Units 1, 2 and 3 and accordingly, we have reported and/or noticed the government agencies concerned.

* Unit 3 has been stopped and being “nuclear reactor cooling hot stop” at 12:15PM.

* The operator trapped in the crane operating console of the exhaust stack was transferred to the ground at 5:13PM and confirmed the death at 5:17PM.

Kashiwazaki Kariwa Nuclear Power Station:

Units 1, 5, 6, 7: normal operation

Units 2 to 4: outage due to regular inspection

[Thermal Power Station]

Hirono Thermal Power Station Units 2 and 4: shutdown due to earthquake

Hitachinaka Thermal Power Station Unit 1: shutdown due to earthquake

Kashima Thermal Power Station Units 2, 3, 5, 6: shutdown due to earthquakeOhi Thermal Power Station Unit 2: shutdown due to earthquake (Unit 3 resumed operation)Higashi-Ohgishima Thermal Power Station Unit 1: shutdown due to earthquake

[Hydro Power Station]

* All the stations have been restored.

[Transmission System, etc.]

4 substations shown below have been shutdown:

– Naka Substation

– Shin Motegi Substation

– Joban Substation

– Nishi Mito Substation

[Blackout in TEPCO’s Service Area]

Total of about 0.26 million households are out of power.

Tokyo: 0

Kanagawa Pref.: 0

Tochigi Pref.: 7,366

Chiba Pref.: 301

Saitama Pref: 0

Gunma Pref.: 0

Ibaraki Pref: 247,853

Yamanashi Pref: 0

Shizuoka Pref: 0 (east of Fuji River)

[Supply and Demand Status within TEPCO’s Service Area to Secure Stable Power

Supply]

Backup supply from Shinshinano Conversion Station: 600MW

Backup supply from Sakuma Conversion Station: 300MW

Backup supply from Higashi Shimizu Conversion Station: 100MW

Backup supply from Kitahon Interconnection Facility: 600MW

Because TEPCO’s facilities have been seriously damaged, power shortage

may occur. TEPCO appreciates customers’ cooperation in reducing electricity usage by avoiding using unnecessary lighting and electrical equipment.

We are taking all measures to restore power, however, we expect extremely difficult situation in power supply for tomorrow as well.

We kindly ask our customers to cooperate with us in reducing usage of power.

Please do NOT touch cut-off electric wires.

______________________________________________________________________

Se ha liberado presión en el reactor 3, se intentan enfriar los reactores 1 y 3 con agua de mar. La radiacción exterior ha subido.

Para el Consejo de Seguridad Nuclear (CSN) de España,  que mantiene su seguimiento de la situación de las centrales nucleares japonesas desde su Sala de Emergencias (SALEM), en permanente coordinación con los organismos internacionales, “según los últimos datos proporcionados por el Centro de Incidencias y Emergencias del Organismo Internacional de Energía Atómica (OIEA), el núcleo del reactor de la unidad 1 de la central nuclear Fukushima Daiichi, tal como ha informado el gobierno japonés, se ha fundido parcialmente. Con respecto al reactor número 3, la última información suministrada por el OIEA confirma la existencia de problemas por la falta de refrigeración del reactor y el titular ha procedido a realizar una estrategia similar a la de la unidad 1, incluyendo emisiones controladas de radiactividad al exterior para reducir la presión en el recinto de contención y la inyección de agua del mar y boro al mismo.  Por lo que respecta a la unidad número 2, la última información indica que sigue sin suministro eléctrico y su reactor se mantiene actualmente parado y con el núcleo refrigerado y cubierto de agua.  Según lo establecido en los Planes de Emergencia, el gobierno japonés ha evacuado a 170.000 personas en un radio de 20 kilómetros de esta central y está considerando la adopción de medidas adicionales de protección a la población”. “Por otra parte, la central nuclear de Fukushima Daini, próxima a la anterior y con 4 unidades (todas ellas en situación de parada tras el terremoto), parece haber recuperado el suministro de energía eléctrica, lo que permitiría mantener la refrigeración de los reactores”.

_______________________________________________

Press Release (Mar 13,2011) Impact to TEPCO’s Facilities due to Miyagiken-Oki Earthquake (as of 1:00PM)

Below is major impact to TEPCO’s facilities due to the Miyagiken-Oki
Earthquake that occurred yesterday at 2:46PM.
*new items are underlined

[Nuclear Power Station] Fukushima Daiichi Nuclear Power Station:
Units 1 to 3: shutdown due to earthquake – Units 4 to 6: outage due to regular inspection

* The national government has instructed evacuation for those local  residents within 20km radius of the site periphery.
* The value of radioactive material (iodine, etc) is increasing accordingto the monitoring car at the site (outside).
* Since the amount of radiation at the boundary of the site exceeds the limits, we decide at 4:17PM, Mar 12 and we have reported and/or noticed the government agencies concerned to apply the clause 1 of the Article 15
of the Radiation Disaster Measure at 5PM, Mar 12. After that, the  radiation dose at the monitoring post decreased once. Today, the measured value revamped and the radiation dose measured at site boundary exceeded
the limiting value again. As such, at 8:56AM, today, it was determined that a specific incident stipulated in article 15, clause 1 occurred and at 09:10AM, today, notified accordingly.
* In addition, a vertical earthquake hit the site and big explosion has happened near the Unit 1 and smoke breaks out around 3:36PM, Mar 12th.
* Unit 1: We started injection of sea water into the reactor core at 8:20PM, Mar 12 and then boric acid subsequently.
* Unit 2: Reactor has been shut down and Reactor Core Isolation Cooling  System has been injecting water to the reactor. Current reactor water level
is lower than normal level, but the water level is steady. After fully  securing safety, we are preparing to implement a measure to reduce the pressure of the reactor containment vessels under the instruction of the
national government.
* Unit 3: High Pressure Coolant Injection System automatically stopped. We endeavored to restart the Reactor Core Isolation Cooling System but failed.
Also, we could not confirm the water inflow of Emergency Core Cooling System. As such, we decided at 5.10AM, Mar 12, and we reported and/or
noticed the government agencies concerned to apply the clause 1 of the Article 15 of the Radiation Disaster Measure at 5:58AM, Mar 13.
In order to fully secure safety, we operated the vent valve to reduce the pressure of the reactor containment vessels (partial release of air
containing radioactive materials) and completed the procedure at 8:41AM, Mar 13 (successfully completed at 09:20AM, Mar 13). After that, we began
injecting water containing boric acid that absorbs neutron into the reactor
by the fire pump from 09:25AM, Mar 13.
* We continue endeavoring to secure the safety that all we can do and monitoring the periphery.

______________________________________________________________________

NHK TV / N24H.com Las imágenes muestran que una parte del edificio del reactor 1 se desplomó tras la explosión del sábado

SITUACIÓN SÁBADO:

N24H.com / En rojo las unidades con problemas graves. Tres de los seis reactores estaban apagados en el momento del terremoto por encontrarse en revisión. La Unidad 1 es la que registró la explosión (este sábado) de su edificio de contención y se informa que el reactor no está dañado y se refrigera inyectando un refrigerante muy sorprendente agua del mar, y sin edificio de contención exterior. En la Unidad 2 se mantienen los niveles de refrigeración bajos pero bajo control  y en la Unidad 3, en situación algo peor, se procede ahora a liberar presión de forma controlada al igual que en la 2. La CNN publica esta cita: “Un funcionario de la agencia japonesa de seguridad nuclear e industrial dijo a CNN que una fusión de un reactor nuclear podría estar en marcha”.

NOTA DE PRENSA DE LA EMPRESA PROPIETARIA DEL COMPLEJO ATÓMICO / DOMINGO 02:00 HORAS HORA LOCAL DE JAPÓN):

http://wp.me/px1Dz-QE (vínculo permanente)

_____________

Press Release (Mar 13,2011)

Plant Status of Fukushima Daiichi Nuclear Power Station (as of 2am March 13th)

All 6 units of Fukushima Daiichi Nuclear Power Station have been shut down.

Unit 1(Shut down)

– Reactor has been shut down. However, the unit is under inspection due to

the explosive sound and white smoke that was confirmed after the big

quake occurred at 3:36PM.

– We have been injecting sea water and boric acid which absorbs neutron

into the reactor core.

Unit 2(Shut down)

– Reactor and Reactor Core Isolation Cooling System have been shut down.

Current reactor water level is lower than normal level, but the water

level is steady. After fully securing safety, we are preparing to

implement a measure to reduce the pressure of the reactor containment

vessels under the instruction of the national government.

Unit 3(Shut down)

– Reactor has been shut down and we continue injecting water by High

Pressure Core Injection System. After fully securing safety, we are

preparing to implement a measure to reduce the pressure of the reactor

containment vessels under the instruction of the national government.

– Currently, we do not believe there is any reactor coolant leakage

inside the reactor containment vessel.

Unit 4 (shut down due to regular inspection)

– Reactor has been shut down and sufficient level of reactor coolant to

ensure safety is maintained.

– Currently, we do not believe there is any reactor coolant leakage inside

the reactor containment vessel.

Unit 5 (outage due to regular inspection)

– Reactor has been shut down and sufficient level of reactor coolant to

ensure safety is maintained.

– Currently, we do not believe there is any reactor coolant leakage inside

the reactor containment vessel.

Unit 6 (outage due to regular inspection)

– Reactor has been shut down and sufficient level of reactor coolant to

ensure safety is maintained.

– Currently, we do not believe there is any reactor coolant leakage

inside the reactor containment vessel.

Casualty

– 2 workers of cooperative firm were injured at the occurrence of the

earthquake, and were transported to the hospital.

– 1 TEPCO employee who was not able to stand by his own with his hand

holding left chest was transported to the hospital by an ambulance.

– 1 subcontract worker at important earthquake-proof building was

unconscious and transported to the hospital by an ambulance.

– The radiation exposure of 1 TEPCO employee, who was working inside the

reactor building, exceeded 100mSv and was transported to the hospital.

– 4 workers were injured and transported to the hospital after explosive

sound and white smoke were confirmed around the Unit 1.

– Presence of 2 TEPCO employees at the site are not confirmed

Others

– We measured radioactive materials inside of the nuclear power station

area (outdoor) by monitoring car and confirmed that radioactive

materials level is higher than ordinary level. Also, the level at

monitoring post is higher than ordinary level. We will continue to

monitor in detail the possibility of radioactive material being

discharged from exhaust stack or discharge canal. The national

government has instructed evacuation for those local residents within

20km radius of the periphery because it’s possible that radioactive

materials are discharged.

– We will continue to take all measures to restore the security of

the site and to monitor the environment of the site periphery.

FUENTE: LA EMPRESA PROPIETARIA



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