ML20147C128

Special Rept 87-010-01:on 871218,north Plant Vent Sample Pump Declared Inoperable for More than 72 H Due to Equipment Failure.Caused by Inadequate Documentation.Schematic Drawings of Vent Sample Flow Sys Made Available

ML20147C128
Person / Time
Site:	Hope Creek
Issue date:	01/08/1988
From:	Ervin A, Labruna S Public Service Enterprise Group
To:	NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
87-010-01, 87-10-1, NUDOCS 8801190083
Download: ML20147C128 (5)

Text

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Public Service Electnc and Gas Company P O. Box L Hancocks Bndge. New Jersey 08038 Hope Creek Operations 1

January 8, 1988 U. S. Nuclear Regulatory Commission Document Control Desk Washington, DC 20555

Dear Sir:

HOPE CREEK GENERATING STATION DOCKET No. 50-354 UNIT NO. 1 SPECIAL REPORT 87-010-01 .

This revision to Special Report 87-010-00 is being submitted to correct minor typographical errors in the original report.

Sincerely, Te kn6M HA S. LaBruna

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Hope Creek Operations AME:

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The root cause of this occurrence was inadequate documentation which delayed the identification of the defective pump intake reed valve. The pump subassembly containing the valve was not ,

replaced within the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> permitted by the Technical Specifications due to difficulties in troubleshooting the cause of the pump inoperability. Corrective actions include revision of the calibration procedure for the rad monitor, availability of controlled copies of the schematic drawings of the North Plant Vent Sample Flow System and updated Instrument Calibration Data Sheets containing manufacturer's calibration accuracy information.

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Process Radiation Monitors (E7IS Designator: Ib)

IDENTIFICATION OF OCCURRENCE North Plant Vent Sample Pump Inoperable For More Than 72 Hours -

Equipnent Failure Event Date: December 18, 1987 Event Time 1630 Hours CONDITIONS PRIOR TO OCCURRENCE The Plant was in OPERATIONAL CONDITION 1 (Power Operation) at 100% power generating 1090 MWe.

DESCRIPTION OF OCCURRENCE On December 18, 1987 at 1630 hours0.0189 days <br />0.453 hours <br />0.0027 weeks <br />6.20215e-4 months <br />, the North Plant Vent Medium-to-High Flow Range Sample Puup was declared inoperable and the preplanned alternate method of monitoring the radionuclide concentration of the vent discharge was begun. The pump was returned to servics on December 23, 1987.

APPARENT CAUSE OF OCCURRENC_Q The root cause of this occurrence was inadequate documentation which delayed the identification of the defective pump intake read valve.

ANALYSIS OF OCCURRENCE When it was determined that the Mid/High Range Flow Vent Sampla Pump which supplies the high range Noble Gas Radiation Monitor l was inoperable, Action Statement 81 of Technical Specification 3.3.7.5 was entered. In accordance with Action 81.a. the pre-planned alternate method of monitoring the noble gas level of the North Plant Vent was initiated.

The pump subassembly containing the defective reed valve was replaced from stores and the pump returned to service. The pump was not restored to operability within the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> permitted by the Technical Specification because the defective part was discovered only after extensive troubleshooting and the replacement of other suspect subassemblies. The following problems contributed to the difficulties encountered during troubleshooting:

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The surveillance procedure'for the calibration of the North Plant Vent Sample Flow System process rad monitor contained steps which were not applicable to the rad monitor.

Insuf ficient control 2 ed schematic drawings of the system were available in the station Technical Document Room (TDR).

The Instrument Calibration Data (ICD) cards did not contain sufficient information to complete calibration of the rad monitor had recalibration been required.

There have been three (3) previous similar occurrences; Special Reports87-001 (February 2, 1987),87-002 (March 3, 1987) and 87-004 (June 10,- 1987). Each of these was caused by equipment failures which could not be repaired within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

Any higher than normal Noble Gas release during the time in which thG North Plant Vent Noble Gas Monitor was inoperable would have been dataated by other process gas monitors and by the 12 hour1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> grab sample. Additionally, the North Plant Vent Mid/High Range Gas Monitor could have been placed in service manually. For this reason the health and safety of the public were not compromised by this occurrence.

This Special Report is being submitted pursuant to Technical Specification 3.3.7.5 Action 81.b.

CORRECTIVE ACTIONS L

1. The surveillance procedure for the calibration of the North Plant Vent Sample Flow System process rad monitor has been revised to delete inapplicable calibration steps.

2. Controlled copies of the schematic drawings of the North Plant Vent Sample Flow System ~ will be made availt.ble through the Hope Creek Technical Document Room.

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3. A program to review all ICD cards is in progress and the Rad Monitor System components which were supplied as discrete packages are scheduled for later review. The Rad Monitor System ICD cards will be reviewed for incorporation of the manufacturer's calibration accuracy information by April 1, 1988.

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Sincerely, f , (ru3nv i4 A S. LaBruna General Manager -

Hope Creek Operations AME:

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