ML17263A999
| ML17263A999 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/27/1995 |
| From: | Widay J ROCHESTER GAS & ELECTRIC CORP. |
| To: | Andrea Johnson NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9504040086 | |
| Download: ML17263A999 (5) | |
Text
P H.IC3R.1MY'ACCELERATED RIDS PROCESSING n
6 REGULATORY INFORMATION DISTRIBUTION SYSTEM (RXDS)
ACCESSIOA NBR:9504040086 DOC.DATE: 95/03/27 NOTARIZED: NO DOCKET N
FACIL:50-244 Robert Emmet Ginna Nuclear Plant, Unit 1, Rochester G
05000244 AUTH.NAME AUTHOR AFFILIATION WIDAY,J.A.
Rochester Gas !!'lectric Corp.
RECIP.NAME RECIPIENT AFFILIATION JOHNSON,A.R.
Project Directorate I-1 (PD1-1)
(Post 941001)
P
SUBJECT:
Forwards written summary of "close-out or class conditions," for 950327 unusual event.
DISTRIBUTION CODE: A001D COPIES RECEIVED:LTR ENCL TITLE: OR Submittal:
General Distribution reduction I
SIZE:
0 NOTES:License Exp date in accordance with 10CFR2,2.109(9/19/72).
05000244 RECIPIENT ID CODE/NAME PD1-3 LA JOHNSON,A INTERNAL: 'FXLE-CENTER 01 NRR/DRCH/HXCB NRR/DSSA/SRXB OGC/HDS3 EXTERNAL: NOAC COPIES LTTR ENCL 1
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1 RECIPIENT ID CODE/NAME PD1-3 PD NMSS/DWM/LLDP NRR/DSSA/SPLB NUDOCS-'ABSTRACT NRC PDR COPIES LTTR ENCL 1
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N NOTE TO ALL"RIDS" RECIPIENTS:
PLEASE HELP US TO REDUCE WASTE! CONTACTTHE DOCUMENTCONTROL DESK, ROOM Pl-37 (EXT. 504-2083 ) TO ELIMINATEYOUR NAMEFROM DISTRIBUTIONLISTS FOR DOCUMENTS YOU DON'T NEED!
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LTTR 13 ENCL 12
ROCHESTER GAS ANDELECTRIC CORPORATlON o 89 EAST AVENUE, ROCHESTER, N. Y.
14849-0001 TELEPHONE AREACODE 716 546-2700 March 27, 1995 U.S. Nuclear Regulatory Commission Document Control Desk Attn:
Allen R. Johnson PWR Project Directorate I-1 Washington, D.C. 20555
Subject:
Follow-up Summary of Close-Out of March 27, 1995 Unusual Event Classification R.E. Ginna Nuclear Power Plant Docket No. 50-244 In accordance. with NUREG 0654, FEMA-REP-1, Rev.
1 reporting requirements which requires a written summary of "close-out or class reduction conditions", the attached close-out summary for the March 27, 1995 Unusual Event classification is hereby submitted.
This event has in no way affected the public's health and safety.
Very truly yours Q.d s
h A. Wida Plant Manager xc:
U.S. Nuclear Regulatory Commission Mr. Allen R. Johnson (Mail Stop 14B2)
PWR Project Directorate I-1 Washington, D.C.
20555 U.S. Nuclear Regulatory Commission Region I
- 475 Allendale Road
- King of Prussia, PA 19406 USNRC Ginna Senior Resident Inspector 9504040086,,950327 PDR ADOCK'05000244 8,.',
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ATTACHMMI'OCLOSE-OUT OF MARCH 27 1995 UNUSUAL EVENT CLASSIFICATION On March 27,
- 1995, with the plant in Cold
- Shutdown, a
main generator hydrogen panel alarm was received at approximately 0835 EST.
Operations personnel in the area discovered that hydrogen was escaping from the main generator seals.
Operators contacted the Plant Safety Coordinator and increased Turbine Building ventilation.
An AuxiliaryOperator (AO) was immediately dispatched to check operation of the Seal Oil System.
As a precaution, all work in the Turbine Building was halted, and unnecessary personnel were requested to leave the building.
At approximately 0850
- EST, due to concerns related to Seal Oil System operation, Control Room Operators directed an AO to initiate degas of the main generator.
At approximately 0900
- EST, March 27, 1995, local air sampling by the Plant Safety Coordinator indicated hydrogen concentration was below the flammable limit.
- However, he estimated from his indications that hydrogen concentration had probably exceeded the flammable limit for a few minutes shortly after the hydrogen gas began escaping.
At approximately 0903
- EST, March 27,
- 1995, the Operations Shift Supervisor conservatively assumed that conditions may have previously existed that would have warranted classification and declaration of an Unusual Event, had they been recognized at that time.
In accordance with EPIP 1-0, "Ginna Station Event Evaluation and Classification,"
Step 4.6, the Operations Shift Supervisor has the option of only classifying but not declaring an Unusual Event under these circumstances.
Therefore, he classified (but did not declare) this as an Unusual Event in accordance with EAL (Emergency Action Level): 8.3.3, "Report or detection of toxic or flammable gases that could enter or have entered within the Protected Area Boundary in amounts that could affect the health of plant personnel or safe plant operation".
Off-site agency notifications were made per EPIP 1-5, "Notifications", using the Emergency Notification System (ENS) and Radiological Emergency Communications System (RECS) as a
matter of consistency and timeliness.
At approximately 0922 hours0.0107 days <br />0.256 hours <br />0.00152 weeks <br />3.50821e-4 months <br />
- EST, March 27,
- 1995, the Plant Safety Coordinator determined that the Turbine Building was available for unrestricted access.
By this time, a carbon dioxide purge had been established on the main generator and all operational/safety concerns had been eliminated.
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