First Response to TEPCO s Fukushima Daiichi NPP Accident --- at the off-site center in Fukushima

Transcription

1 Regional Workshop on Observing a Nuclear Emergency Response Exercise of a Local Government First Response to TEPCO s Fukushima Daiichi NPP Accident --- at the off-site center in Fukushima October, 2013 Nuclear Emergency Preparedness Response and Department Japan Nuclear Energy Safety Organization 1

2 Contents 1. Introduction 2. Equipment in Nuclear Emergency Response Operations Center (Off-site Center: OFC) 3. Establishment of Local Emergency Response Headquarters (Local HQs) 4. Residents Evacuation 5. Conclusions This material is the summary of the report as shown in the below URL. 2

3 1. Introduction JNES investigated the initial operation at Local Headquarters By hearing leaders of Functional groups who had worked at OFC at that time By consulting Interim Investigation Report by Investigation Committee on the Accident at Fukushima NPP of Tokyo Electric Power Company This report describes as below. The situation of the equipment damage in Fukushima OFC by the Tohoku District-off the Pacific Ocean Earthquake Activities at OFC form March 11 when the earthquake to March 15 when Local Headquarters relocated. 3

4 2. Equipment in Nuclear Emergency Response Operations Center (Off-site Center: OFC) 4

5 Location of Related Facilities Fukushima Prefecture Office (Temporary off-site center) Alternative off-site center 20 Km Fukushima Daiichi NPP Off-site center 10 Km 3 Km Japan Air Self-Defense Force Otakineyama Base Fuku shima secon Nuclear dpower station Fukushima Daini NPP Fukushima Daiichi NPP is hereinafter called as "1F" Fukushima Daini NPP is hereinafter called as "2F" J-Village - 5

6 Fukushima OFC Appearance of duct for air conditioning (Photographed on Nov/10, 2011) Appearance of Fukushima OFC (Photographed on Nov/10, 2011) At the moment of earthquake generation of March 11, the intensity 6 upper was observed at Okuma- Town where OFC is placed. The OFC building itself remained intact in appearance, and the inside also remained almost without excepting that book shelves fell over, and an air-conditioning duct in 2 nd floor close to coming off. 6

7 Internal Configuration of OFC Pump room Women s toilet Booths of Prefecture and towns Men s toilet Hall Room of Director- General of Local Headquarters Public Affair Group Administrative Group Resident Health and Safety Group Kitchen System device room General conference room Medical Care Group Radiation Protection Group Press room Executive conference room Plant Group Relevant ministries and agencies Licensee Booth (1 st floor) (2 nd floor) 7

8 Ω D VD Ω D VD Overview of OFC Facility Nuclear Emergency Response HQ (Office of Prime Minister) Video Conf. Sys. Telephone Satellite communication system Video Input Distributor Control table Off-site Center Large Display Module (General Mtg.) Out-of-door Dosimeter Indoors Dosimeter ERC (NISA/METI) Video Conf. Sys. Telephone, Fax Dedicated/Common LANs INMARSAT Satellite Communication Facility Control table Medium Display Module (Policy Making Conf.) Small Display Module Video System Ambience Dosimeter Sys. (Admin. Support team) Emergency Operation Center (MEXT) JNES (ERSS) EPRNet Transportable Satellite Phone Video Conf. control unit. IP-PBX VTR TV monitor (Press team) Microphone Camera Video Conference System (Policy Making Conf./General Mtg.) NUSTEC (SPEEDI) JAEA/NEAT General public line Coincidentally calling contact sys. Telephone FAX Telephone/FAX Facility 各種システム Various Terminals Japan Weather Association (MICOS) Prefecture office Video Conf. Sys. Telephone, Fax Municipality office Video Conf. Sys. Telephone, Fax Local Network Electricity utility Internet Emergency communication network Security telephone (Connect to WAN) Local Router Widespread Router Alarm Display Fire wall Utility security telephone in disaster specialist room ERSS (Plant Grp) SPEEDI for Resident Health and Safety Grp Dedicated LAN Common LAN Press room Control table Camera SPEEDI for Radiation Grp Video monitor Weather Information Sys (Radiation Grp) PC Printer PC Printer Press camera system Dedicated LAN Common LAN House aircast system 8

9 Damages of Power Supply and Communication System in OFC Day Time Power Supply Communication TEPCO Mar :46 Earthquake occurrence 14:46 14:47 Around 15:23 Loss of power DG started up DG stopped (DG burned up the oil and pumps for fuel supply were broken by earthquake) 16:43 Lines of telecommunication carrier were cut by an aftershock. 21:20 Video conference was available by using a portable generator Mar. 12 Around 01:00 DG was recovery and was tested Mar. 13 Around 03:16 03:17 DG relay contact repaired OA equipment restored Fixed-type satellite communication and mobile satellite communication became available. [Telephone, Facsimile, Videoconference] Mar. 14 Mar :59 Relocation started and DG stopped Fixed-type satellite communication and mobile satellite communication were discontinued. 9

10 Radiation Protection Measure in OFC Ordinance for Enforcement of the Special Law for Nuclear Emergency prescribes radiation protection of OFC as follows: The OFC shall be constructed by using concrete walls, and equipped with ventilation system and other necessary measures to reduce exposure. The OFC shall be equipped with necessary devices to clean up human body or work clothes and shoes contaminated with radioactive materials. The OFC has concrete walls and ventilation system, but no air cleaning filter. The OFC has the personal radiation protectors as personal dosimeter and others. 10

11 Record of Fukushima OFC Monitor (2011/3/11-18) Monitor 1 (outdoor) Monitor 2 (indoor) Monitor 1 (outdoor) Monitor 2 (indoor) Maximum value of Monitor msv/h (at 10:06 of Mar. 15) Mar. 13 about 9:00 venting at 1F-3 Mar. 12 about 15:36 Explosion at 1F-1 Mar. 13 about 12:30 venting at 1F-3 Mar. 14 about 11:01 Explosion at 1F-3 Maximum value of Monitor x 10-2 msv/h (at 12:02 of Mar. 16) Mar. 15 about 16:05 venting at 1F-3 Mar. 16 about 1:55 venting at 1F-3 Mar. 15 about 6:00-6:10 Sonic booms at 1F-2 & 4 Mar. 12 about 14:30 PCV pressure decreased by ventilation at 1F-1 Mar. 14 about 5:20 venting at 1F-3 Date 11

12 Fukushima OFC at 2011/11/11 12

13 Materials and Equipment for Radiation Countermeasures Stockpiled in OFC No. Materials and equipment Number No. Materials and equipment Number 1 Pocket dosimeter (D0SE3) Survey meter to measure surface contamination with α-ray 4 1 Radiation meter ionization chamber 21 2 GM-typed radiation meter 6 3 Survey meter to measure 5 3 Radiation meter NaI 9 surface contamination withβ/γray 4 γ-ray survey meter 4 4 Individual exposure dosimeter ZP Stockpile by the Government 5 Neutron survey meter 2 5 Individual exposure dosimeter ZP Stockpile by the Prefecture 6 Full-face mask 4 6 Decontamination kit Clean and others 2 sets 7 Radioactive dust/iodine filter 8 7 Half-faced protective mask GM-81S Disposable mask Full-faced protective mask GM Protective suit made of nonwoven Canister of protective mask CA-L4RI 1460 cloth 10 Shoes cover Tyvek (Nonwoven Clothes) 3L Rubber glove 4 11 Tyvek (Nonwoven Clothes) 2L Thin-cotton glove Cotton glove 18 DOZ 13 Waste cloth 1 pack 13 Rubber glove 11 DOZ 14 Curing sheet 1 14 Cotton socks Shampoo 5 15 Overshoes (for high boots) Neutral detergent 5 16 Protective goods set (individual bag)* 150 sets 17 Stable iodine (50 mg potassium iodide x 2 tablets) Rubber high boots 75 13

14 3. Establishment of Local Emergency Response Headquarters (Local HQs) 14

15 Circumstances on March 11 th The actual circumstances of March 11 after occurrence of earthquake are summarized as follows. Starting-up of OFC by the general manager of Fukushima Daiichi office Movement of Vice-Minister of METI and others to Local HQs Gathering of relevant institutions to Local HQs 15

16 Circumstances on March 11 th Time Progress of events Government situation Outline of OFC circumstances 14:46 Occurrence of earthquake 14:47 Around 15:00 Emergency Response HQs Transmission of plant data from 1F-site to ERC stopped. Senior disaster prevention specialists and safety inspectors (hereinafter employees ) were carrying out inspection in the plant Emergency DG started up due to blackout inside OFC building. Employees confirmed automatic shutdown of 1F-1, 2 and 3 in emergency response room of 1F-site. 15:23 Around 15:23 15:42 1F site, Art. 10 Notification (SBO by tsunami) DG of OFC stopped; LAN equipment/in-ofc IP-phones unable to use. Analogue phones (disaster priority phones, etc.) available until noon of 12, but had difficulty in getting through. 3 employees returned to OFC 15:45 5 personnel for operation support arrived. Around 16:30 From MEXT, the Leader of Radiation Protection Group and 2 other employees started to OFC. 16:36 1F site, event falling under Art. 15 reported (ECCS unable to inject water) 16:43 ERSS stopped transmission (2F site) (KDDI optical cable disrupted) 17:00 From METI, Vice-Minister of METI (Director-General of Local HQs) and onsite personnel started to OFC. 17:35 2F site, Art. 10 notification Around 19:00 Vice-Minister and Secretary-General and other on-site personnel arrived at Ichigaya/Tokyo. 16

17 Circumstances on March 11 th 19:03 Around 20:00 20:50 20:55 21:10 21:10 21:20 21:23 22:10 1F site, Emergency state declaration Nuclear Emergency Response HQs 2-km evacuation; The Prefecture instruction 3-km evacuation, 10-km in-door shelter; Prime Minister s instructions (1F) 3 personnel (Police officers from Futaba) for Resident Health and Safety Group arrived. Vice-Minister, Secretary General and others started for OFC by helicopter (Ichigaya/Tokyo) 3 prefectural employees for Resident Health and Safety Group started from Soso/Fukushima Regional Development Bureau to OFC Nuclear emergency car s satellite phone became available (available till 13:55 of March 14) Personnel of Local HQs provisionally moved to adjacent Prefectural Nuclear Center Vice-Minister of METI arrived at Otakineyama/Fukushima Sub Base of Air Force (moved to OFC on Self-Defense Force s car) 22:40 3 members for Prefectural Resident Health and Safety Group arrived. 23:03 24:00 Vice-Governor of Prefecture and others arrived. Vice-Minister of METI, Secretary, Councilor, Inspection section chief and 7 others, 1 person from executive office of Nuclear Safety Commission, and head of Disaster Prevention/Environment Control Office of MEXT and 2 others arrived. 17

18 4. Residents Evacuation 18

19 Outline of OFC Situation March 11 14:46 All of NPS Units 1 through 3, which were in operation, automatically shut down due to the high earthquake acceleration. 15:34 Fukushima Daiichi NPP 15:41 All of the emergency DGs stopped because the emergency DGs, seawater system that cooled the emergency DGs, and metal-clad switchgears were submerged due to the tsunami. Fukushima Daini NPP All of NPS Units 1 through 4, which were in operation, automatically shut down due to the high earthquake acceleration. All reactor coolant system (excluding RCIC) including RHR system for Unit 1 and 2 and all reactor system (excluding HPCS and RCIC) including RHR for Unit 4 were unavailable due to the tsunami. 15:42 TEPCO notified the national government, local governments, and other parties concerned of Article :45 TEPCO notified NISA and other parties concerned of Article 15 (General Emergency) 18:33 TEPCO notified of Article 10 (Units 1,2 and 4) 19:03 Prime Minister declared the General Emergency. 20:50 Evacuation direction in radius 2 km by Fukushima prefecture governor 21:23 Evacuation in radius 3 km, and indoor shelter in radius 10 km by the national government March 12 5:22 5:23 5:44 Evacuation in radius 10 km 6:07 7:45 17:39 18:25 Evacuation in radius 20 km TEPCO notified of Article 15 (Unit 1) TEPCO notified of Article 15 (Unit 2) TEPCO notified of Article 15 (Unit 4) Prime Minister declared the General Emergency. Evacuation in radius 10 km by the national government March 15 11:00 Indoor shelter in radius km (62,400 residents) March 21 Evacuation radius was changed form 10 km to 8 km by the national government 19

20 Protected Areas March April 12 - Evacuation Area kwamata Iitate Minami Soma Evacuation Prepared Area in case of Emergency Deliberate Evacuation Area In-door Shelter Area (20~30 km radius) Evacuation Prepared Area in case of Emergency Katsurao Namie Evacuation Area Futaba Area where radioactive materials to be accumulated at high levels Deliberate Evacuation Area Ono Tamura Kawauchi Okuma Tomioka Naraha Fukushima Daiichi Fukushima Daini In-door shelter area excluding deliberate evacuation area was renamed as evacuation prepared area in case of emergency. Deliberate evacuation area needed to establish for specific areas beyond 20km radius where radioactive materials are to be accumulated at high levels. Evacuation Prepared Area in case of Emergency Hirono 20

21 Restricted Area (*1) Deliberate (*2) Evacuation Area Evacuation-Prepared Area Total (no. of in case of Emergency (*3) persons) (*4) 1 Futaba Town Approx. 6,900 Approx. 6,900 2 Okuma Town Approx. 11,500 Approx. 11,500 3 Tomioka Town Approx. 16,000 Approx. 16,000 4 Naraha Town Approx. 7,700 Approx. 10 Approx. 7,710 5 Namie Town Approx. 19,600 Approx. 1,300 Approx. 20,900 6 Hirono Town Approx. 5,400 Approx. 5,400 7 Tamura City Approx. 600 Approx. 4,000 Approx. 4,600 8 Minamisoma City Approx. 14,300 Approx. 10 Approx. 47,400 Approx. 61,710 9 Kawauchi Village Approx. 1,100 Approx. 1,700 Approx. 2, Katsurao Village Approx. 300 Approx. 1,300 Approx. 1, Kawamata Town Approx. 1,200 Approx. 1, Iitate Village Approx. 6,200 Approx. 6,200 Total Approx. 78,000 Approx. 10,010 Approx. 58,510 Approx. 146,520 (*1) Approximately 78,000 from the Restricted Area (within a 20km radius from the Fukushima Daiichi Nuclear Power Plant) (*2)Approximately 10,000 people from the Deliberate Evacuation Area where there was a concern that cumulative air dose might reach 20mSv within a one-year period. (*3)Approximately 58,000 people from the Evacuation-Prepared Area in case of Emergency where sheltering orders issued on March 15, 2011 had been lifted. (*4)Twelve municipalities were designated evacuation zones by August 29, 2011, the number of evacuees had reached a total of approximately 150,000 people. 21

22 1. Situation of Evacuation 1.4 Situation of Resident Evacuation (Situation on 11 to the 16th) Residents Evacuation (March 11-15) Almost all residents completed evacuation, and there was no resident in the 20-km zone. (Unit-1, north west) (Unit-2, north west) (Near the Main gate) (Neighborhood) (Unit-2, west south west) Okuma Tomioka Futaba Namie Naraha Hirono Minamisoma Katsurao (20-km zone) Tamura Kawauchi Village (20-km zone) 40 km from 1F 22 km from 1F 40 km from 1F 30 km from 1F 40 km from 2F 40 km from 2F Outside of 30-km zone 60 km from 1F Outside of 30-km zone 60 km from 1F Iwaki Kawamata Iitate Katsurao Village (whole-village evacuation) OFC relocation Kawauchi Village (whole-village evacuation) Fukushima Daiichi NPS MP-1 MP-2 MP-5 MP-6 MP-4 MP-3 Fron t MP-7gate MP-8 22

23 5. Conclusions Local Headquarters was set up at OFC, as result of the accident at Fukushima Daiichi NPP due to the Tohoku District-Off the Pacific Ocean Earthquake followed by tsunami on March 11, The original operation was significantly restricted, because of various obstacles such as the collapse of means of communication resulting from severed communication lines. food and fuel shortage resulting from stagnant physical distribution increasing radiation dose around the OFC. As a results from investigation of Local HQs initial actions, it became possible to grasp the actual situation such as actions taken by and mutual collaboration from March 11 to 15. In spite of various obstacles in OFC, the personnel gathered at OFC could catch the information about resident s evacuation, which was successfully carried out. 23

24 It is necessary for JNES to permit if copy, reprint or quotation of this document. 24