05000278/LER-1981-015, Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted

Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted

ML20032E985
Person / Time
Site:	Peach Bottom
Issue date:	11/06/1981
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20032E986	List: 05000278/LER-1981-015, Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted
References
NUDOCS 8111230576
Download: ML20032E985 (3)

LER-1981-015, Forwards LER 81-015/01T-1.Detailed Event Analysis Submitted

Event date:
Report date:
2781981015R00 - NRC Website

text

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1 PHILADELPHIA ELECTRIC COMPANY 2301 M ARKET STREET P.O. BOX 8699 1881 -1981 PHILADELPHIA, PA.19101 (215)841-4000 November 6, 1981 DI

/(h N

?' R((I fI L.l?

s Mr.

R.

C.

Haynes, Director

[.

Office of Inspection and Enforcement NOV2 01991m-[3j Region I u

US Nuclear Regulatory Commission ce ru cn 631 Park Avenue b

'k,,,

King of Prussia, PA 19406 I r &,

SUBJECT:

Licensee Event Report Narrative Description

Dear Mr. Haynes:

The following occurrence was reported to Mr.

R.

Blough, Region I, Office of Inspection and Enforcement on October 23, 1981.

Reference:

Docket No. 50-278 Report No.:

LER 3-81-15/1T-0 Report Date:

November 6, 1981 Occurrence Date:

October 23, 1981 Facility:

Peach Bottom Atomic Power Station RD #1, Delta, PA 17314 Technical Specification Reference:

Technical Specification 3.2.D.1 (c) states that "Upon the loss of both off-gas system radiation monitors, either temporary monitors shall be used to monitor radiation releases to the environs or initiate an orderly shutdown and have the main steam isolation valves closed within eight hours."

-}

8111230576 Bill I

QDRADOCK05000 hb

Mr.

R. C. Haynes Page 2

' Detailed Description of the Event During post refueling outage startup operations with an air ejector in service, the plant chemist noted that the offgas monitoring system was not receiving sufficient flow.

Investigation revealed that the sample line root valve to the monitors was closed.

Although portable radiation monitoring instruments were installed on the offgas pipe prior to startup, no routine monitoring of the equip.nent was initiated since it was not known that the offgas sampling system was out of service.

The portable instrumentation was observed on several occasions and noted to be within acceptable limits.

Probable Consequences of the Occurrence The offgas monitors do not provide a trip function, only operational data, with the recombiner in service.

The effluent from the recombiner system is monitored by the offgas stack radiation monitors which were operational during the event.

Additionally, power levels were less than 15% during the event.

Cause of occurrence Modifications to the offgas ' system replaced the sample line root valve.

The valve was not opened during the offgas system lineup because it did not appear on the check-off list.

Corrective Actions

The sample line root valve was opened, thus restoring proper flow to the offgas monitors, l

Mr.

R.

C.-Haynes Page 3 Actions Taken to Prevent Reoccurrence The. sample line root valve was added to the system check-off list.

Very truly yours, jfkb/fl(

. J '. Cooney g

Superintendent //

Geperation Division - Nuclear l