ML20082L149

Followup RO 83-01:on 831103,fire Suppression Water Sys Declared Inoperable After Pump 1-1 Failed Testing.Mod Underway to Install New Pressure Relief Valves on Both Fire Pumps

ML20082L149
Person / Time
Site:	Oyster Creek
Issue date:	11/18/1983
From:	Fiedler P GENERAL PUBLIC UTILITIES CORP.
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-83-01, RO-83-1, NUDOCS 8312050425
Download: ML20082L149 (3)

Text

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GPU Nuclear Corporation l ,. g g7 Post Office Box 388 Route 9 South Forked River, New .lerwy 08731 0388 609 971-4000 Write 's Direct Dial Number:

November 18, 1983 Dr. Thomas E. Murley, Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Special Report 83-OlT Fire Suppression Water System Inoperability This letter forwards three copies of the fourteen (14) day follow-up report to Special Report 83-01 in cepliance with paragraph 3.12.B.3.b.3 of the Technical Specifications.

Very truly yours, JA A 'gf-Q[z---

Peter B. Fiedler Vice President and Director Oyster Creek PBF:RPJ: dam Enclosures cc: Director (40 copies)

Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Director (3)

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, DC 20555 IEC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, IU 08731 0312050425 831118 n DR ADOCK 05000219 n r PDR l-GPU Nuclear Corporation is a subsidiary of the General Pubhc Utiht:es Corporation I t

OYSTER CREEK NUCLEAR GENERATING STATION Forked River, tU 08731 Special Report 83-01T Report Date November 18, 1983 Occurrence Date November 3, 1983 Identification of Occurrence While fire pump 1-2 was out of service for maintenance, fire pump 1-1 was flow tested and did not meet the requirements of Technical Specifications, paragraph 4.12.B.1.e.l. These test results led to fire pump 1-1 being declared inoperable. With both fire pumps 1-1 and 1-2 inoperable, the fire suppression water system was considered inoperable.

While investigating this incident, it was discovered that the flow test operability requirements of Technical Specifications, paragraph 4.12.B.l.e.1, had not been met for fire pump 1-1 since the incorporation of these requirements into the Technical Specifications '.n December, 1981.

'Ibese events require a Special Report to the Commission as defined in the Technical Specifications, paragraph 3.12.B.3.b.

Conditions Prior to Occurrence Plant is in an outage condition with no fuel in the vessel.

Description of Occurrence On November 3, 1983, the Fire Suppression Water System at Oyster Creek was declared inoperable based on the following conditions:

1. Fire pump 1-2 had been taken out of service on October 22, 1983 at approximately 1045 hours0.0121 days <br />0.29 hours <br />0.00173 weeks <br />3.976225e-4 months <br />. Smoke was observed emitting from under the pumphead during a post-maintenance in-service test.

2. Fire pump 1-1 was determined inoperable on November 3, 1983. The pump test recorded the pump discharge pressure at 135 psig for 2006 GPM. Technical Specifications require 2000 GPM at a system head of 360 feet.

Special Report 83-01 Page 2 Apparent Cause of Occurrence The gearbox antirotation device of fire pump 1-2 required machining. Tnis was the apparent cause of inoperability for pump 1-2.

Tne inoperability of fire pump 1-1 can be attributed to not identifying pump inoperability on past functional tests. 'Ihe acceptance criteria in surveillance procedure 645.6,012, " Fire Pump Functional Test" was not properly revised to reflect the Technical Specification surveillance requirements whien were issued via Amendment 58 on December 21, 1981. The procedure required comparison of flow and pressure test data against the design rated curve of the pump. Significant deviation from the design curve was used as the criterion for inoperability, rather than the 'Ieennical Specification requirement of 2000 GPM at a system head of 360 feet.

It is believed that fire pump 1-1 relief valve (set at 150 PSIG) does not allow the pump to achieve the required pressure. Although pump 1-2 also has a relief valve setting of 150 PSIG, it has met the Technical Specification l requirements for operability on previous functional tests. This may be because of relief point variation.

l 1

Corrective Action Fire pump 1-2 was declared operable at 1830 hours0.0212 days <br />0.508 hours <br />0.00303 weeks <br />6.96315e-4 months <br /> on November 9, 1983. The antirotation device was machined to specified tolerances correcting tin overheating and smoking condition observed on October 22, 1983.

t A modification is underway to install new pressure relief valves on both fire l

pumps 1-1 and 1-2. It is expected that the new relief valve on fire pump 1-1 will allow the aystem to obtain a discharge pressure that will be in compliance with the Tecnnical Specifications. Should this modification not rectify the situation, further corrective action will be taken within thirty days.

The acceptance criteria in procedure 645.6.012 has been revised to incorporate the requirements in Section 4.12.B of the Oyster Creek Technical Specifications.

In addition, a complete review of all Surveillance procedures has been conducted to ensure enat tne procedures reflect Technical Specification requirements.

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