ML19330C707

Forwards LER 80-011/01T-0

ML19330C707
Person / Time
Site:	Peach Bottom
Issue date:	07/28/1980
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19330C708	List: ML19330C707 ML19330C714
References
NUDOCS 8008110373
Download: ML19330C707 (2)

Text

!. o .

PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA. PA.19101 (2151041-4000 July 28 1980 Mr. B oy c e 11. Grier, Director Office of Inspection and Enforcement ,

Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

SUBJECT:

Licensee Event Report Narrative Description The f ollowing occu rrence was reported to Mr. Cowgill, U.S. Nuclear Regulatory commission, Region I, Office of Inspection and Enforcement, on July 15, 1980.

Reference:

Docket Nos. 50-277 50-278 Report No.: LER 2-80-11/1T-0 Report Date: July 28, 1980 Occurrence Date: July 14, 1980 Facility: Peach Bottom Atomic Power Station l RD 1, Delta, PA 17314 l

l Technical Specification

Reference:

Technical Specification 3.14.B.3 states in part that "The Diesel Generator CO2 Fire Protection System shall be operable when the Diesel Generators are required to be operable with the system comprized of ... an operable flow path to each room".

Description of the Event:

i During training on the system, the diesel generarcr cardox system vapor pilot valve was discovered closed. The vapor j pilot valve must be open to provide pressure to open the diesel ,

room c a r.lo x deluge valves. The system was therefore inoperable I for both automatic and manual injection of cardox.

l

sees 11o373

l. .

Mr. Boyce II . Grier Page 2 July 28, 1980 LER 2-80-11/1T-0 Consequences of Event:

In the event of a fire in one of the diesel generator rooms, the cardox would not have injected manually or automatically, however, the carbon dioxide injection system is automatically disabled in the event of a LOCA.

Cause of Event:

The cause initially appeared to be a failure to properly clear a safety permit. Further investigation revealed the vapor pilot valve was not a part of the safety permit and also that the pilot valve did not appear on plant drawings (P6ID), system check-off lists, or the locked valve list. Reason for closure was not determined.

• _ Corrective Action:

The vapor pilot valve was immediately opened and locked. The two other cardox tanks were inspected. The vapor pilot valves (located under the tank hood) were open but not locked. Locks were applied, plant drawings (P&ID) were marked up to show the vapor pilot valves as locked open. The valves were added to system check-off lists and the locked valve list. Plant drawing (P61D) revision requests have been issued to revise the drawings to include the vapor pilot valves as locked open.

Previous Similar Occurrences:

LER 2-79-2/IP.

Very truly yours, 1

. ooney l Su rintendent l C eration Division / Nuclear Attachment cc: Director, NRC - Office of Inspection and Enforcement  ;

Mr. Norman M. Haller, ?' AC - O f fice of Management &

Program Analysis  !

i I

- , - -,-- - - ~ . .

- , . -- ,