05000272/LER-1979-043-01, /01T-0 on 790522:auxiliary Feedwater Pumps Discharge Valves Demand Reduction to 0%.Caused by Deficient Surveillance Procedure.Immediate Change Initiated to Leave Demand Signal at Normal Value

/01T-0 on 790522:auxiliary Feedwater Pumps Discharge Valves Demand Reduction to 0%.Caused by Deficient Surveillance Procedure.Immediate Change Initiated to Leave Demand Signal at Normal Value

ML19269D700
Person / Time
Site:	Salem
Issue date:	06/05/1979
From:	Kapple A Public Service Enterprise Group
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19269D696	List: 05000272/LER-1979-043, Forwards LER 79-043/01T-0 05000272/LER-1979-043-01, /01T-0 on 790522:auxiliary Feedwater Pumps Discharge Valves Demand Reduction to 0%.Caused by Deficient Surveillance Procedure.Immediate Change Initiated to Leave Demand Signal at Normal Value
References
LER-79-043-01T, LER-79-43-1T, NUDOCS 7906110231
Download: ML19269D700 (3)

LER-1979-043, /01T-0 on 790522:auxiliary Feedwater Pumps Discharge Valves Demand Reduction to 0%.Caused by Deficient Surveillance Procedure.Immediate Change Initiated to Leave Demand Signal at Normal Value

Event date:
Report date:
2721979043R01 - NRC Website

text

Report Number:

79-43/0lT Report Date:

6/05/79 Occurrence Date:

5/22/79 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancock's Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Auxiliary Feedwater Pumps Discharge Valves Closed during Surveillance Testing CONDITIONS PRIOR TO OCCURRENCE:

Refueling Mode 6 DESCRIPTION OF OCCURRENCE:

In reviewing the surveillance procedure which demonstrates the opera-bility of No. 13 (23) steam driven auxiliary feedwater pump during operational modes 1, 2, and 3 as required by Technical Specification 3.7.1.2, it was discovered the procedure called for the valve demand to be reduced to 0% for the motor driven feedwater pumps discharge control valves (AF-21's) in addition to the closure of the steam driven feedwater pump discharge control valves ( AF-ll's).

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of this occurrence was a deficiency in the surveillance pro-cedure.

The AF-21 and AF-ll valves were originally required to be shut to insure a single test flow path and to insure no auxiliary feedwater flow to the steam generator during the test evolution.

How-the AF-21's are normally closed and open to a preset valve

ever, demand only when the associated motor driven pump develops the required discharge pressure.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.7.1.2 requires at least three independent steam generator auxiliary feedwater pumps and associated flow paths operable when in modes 1, 2 or 3, with two feedwater pumps capable of being powered from separate vital busses and one feedwater pump With capable of being powered from an operable Lteam supply system.

one feedwater pump inoperable, restore at least three auxiliary feed-water pumps to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in hot shutdown within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

The average duration of the pump test has been 10 minutes after which normal auxiliary feedwater system lineup is verified.

The ECCS automatic start of the moc.or driven feedwater pumps is not disabled nor is remote control of the AF-21 valves taken from the control room reactor operator during the steam driven pump test.

2255 010 7906012,23/,

LER 79-43/0lT CORRECTIVE ACTION:

To insure full operability of the motor driven auxiliary feedwater pumps during the surveillance evolution, an on-the-spot change has been initiated to leave the demand signal for the AF-21 valves at the normal value.

Also, the AF-1, 3, 10, 20, 22, 23 and 86 manually operated valves normal position has been changed from open to locked open.

A further review of the surveillance procedures found no other pro-cedure deficiencies.

No further corrective action is required.

FAILURE DATA:

Not Applicable Prepared By A.

W.

Kapple

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Manager

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