ML20069J640

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Forwards Scenario Outline for 821014 Emergency Plan Evaluation Exercise,Per NRC 820112 Guidance Ltr
ML20069J640
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 09/01/1982
From: Ward E
NORTHERN STATES POWER CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
NUDOCS 8210250200
Download: ML20069J640 (2)


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414 Nicollet man Minncapohs, Minnesota 55401 Telephone (612) 330-5 September 1, 1982 Regional Administrator Region III U S Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 License Nos. DPR-42 50-306 60 Emergency Plan Exercise - October 14, 1982 Responsive to your January 12, 1982 guidance letter, attached, is the Scenario Outline that we have developed for the subject exercise.

Copies of this Outline are being forwarded to FEMA by the Minnesota Division of Emergency Services and the Wisconsin Division of Emergency Government.

E C Ward Manager-Nuclear Environmental Services ECW/ dab Attachment cc Kenneth C Parsch, MDES w/o attachment Joseph L LaFleur, WDEG w/o attachment Brian K Grimes, U S NRC-Division of Emergency Preparedness 0210250200 820901 PDR ADOCK 05000282 PDR p

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PRAIRIE ISLAND NUCLEAR GENERATING PLANT

. EMERGENCY PLAN EVALUATION EXERCISE SCENARIO OUTLINE (October 14, 1982)

Initial Conditions The plant is initially at full power. One (#1) diesel generator is out of service.

Time Comment 0745 Initial conditions are given to the operating crew.

0815 While performing the diesel generator #2 surveillance test, a fire occurs. The second diesel generator must be shut down. A Notification of Unusual Event is to be declared since the plant must be shut down.

0845 Increasing containment airborne activity indicated on IR11 and IR12 by alarm. ,

0900 Diesel generator fire is out. Reactor Coolant System (RCS) leak rate reported at 10 gpm.

0930 ' RCS leak rate is 60 gpm. An Alert should be declared.

1000 Continuous Air Monitors (CAM) alarms and radiation monitor alarms indicate possible containment release.

1030 A Large Break Loss of Coolant accident occurs. A Site Area Emergency should be declared. Two fan coil units lost.

Containment spray pump seizes.

1045 Containment spray pump #1 breaker malfunction. #1 containment spray pump lost.

1100 Leak through containment purge line starts. '

1130 Off-site dose reaches level necessitating General Emergency declaration.

1200-1230 Lunch * -

1230 Continue exercise. General Emergency level. Release continuing.

1245 #1 containment spray pump breaker replaced. Pressure starts to fall off.

1330 Purge valve repaired.' Reduce to Site Area Emergency level.

1400 Containment fan coils returned to service. ,

1430 Downgrade to Alert based on plant at cold shutdown. Terminate drill. Re-entry starts. Closcout with state agencies.

MA071982C01 -

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