ML19352A088

RO 50-219-77-2-1P:on 770313,stack Gas Low Flow Alarm Sounded in Control Room Indicating Tripped B Stack Gas Sample Pump. Cause Unknown.Stack Gas Sump Pump Isolated

ML19352A088
Person / Time
Site:	Oyster Creek
Issue date:	03/15/1977
From:	Mcnair R JERSEY CENTRAL POWER & LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-50-219-77-2, NUDOCS 8103040263
Download: ML19352A088 (2)

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Initial Telephona -

Date 'f Report Date: - Karch 15 w 377 Occu..ence: March 14, 1977 Initial Written "

Ti:r.e of  !

Report Date: March 15,.1977 - Occurrence: 1143 l OYSTER CREEK NUCLEAR GENERATING STATION FORKED RIVER, NEW JERSEY 08731 l Reportable Occurrence Report No. 50-219-77-2-lP IDENTIFICATION OF OCCURRENCE: Violation of the Technical Specifications, paragraph 3.6.A.3 when the radio gases released from the stack were not con-tinuously monitored.

This event is considered to be a reportable occurrence as de-fined in the Technical Specifications, paragraph 6.9.2.A.2.

CONDITIO'IS PRIOR TO OCCURRENCE: XX Steady State Power Routine Shutdown Hot Standby Operation Cold Shutdown Load Changes During Routine Refueling Shutdown Power Operation Routine Startup -

_ 0ther (Specify)

Operation ___ _ _

The major plant parameters -at the time of the occurrence were:

POWER: Reactor 1379.6 Generator 465 Mbig R.0W: Recirc 13.5 x 100 I Feedwater 5.03 x 10g/hr lb/hr STACK GAS: 11,400 uci/sec.

DESCRIPTION --

l 0F OCCURRENCE: On Monday, March 13, 1977 at approximately 1143 hours0.0132 days <br />0.318 hours <br />0.00189 weeks <br />4.349115e-4 months <br /> a " Stack Gas Low Flow" alano sounded in the station control room. In-vestigation revealed that "B" stack gas sample pmp had tripped.

At approximately 1146 "A" Stack Gas Sample Pump was put in servic and "B" Stack Gas Sample Pump was isolated. An electrician was dispatched and found no ismediate cause for ptz1p trip and at approximately 1201 "B" Stack Gas Pwap was placed back in service.

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THIS DDCUMENT CONTAINS POOR QUAUTY PAGES i

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t leportable Occurrence -

teport No. 50-219-77-2-lP Page Two LPPARENT CAUSE Design ~ Procedure l F OCCURRENCE: l Manufacture Unusual Service Condition Installation / Inc. Environmental Construction Component Failure Operator F0ther (Specify) ,

Under Investigation. -

MALYSIS OF CCURRENCE: The safety significance of this event is considered to be minimal since during the 3 minute period the sample system was inoperable no increases were noted in off gas activity or in area radiation monitor readings. Furthermore, when returned to service the stack gas monitors indicated the same as they did before the failure.

-- It can, therwfore, be concluded that the radio gases emitted from the stac1 were stable and constant during the period of inoperability.

ORRECTIVE CTION: Immediate corrective action was to isolate "B" stack gas sample pump and put "A" stack gas sample pump into service.

AILURE ATA: N/A _,

repared by , f Robert C. McNair 4 Date: March 15,1977 m-

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