05000272/LER-1982-058, Forwards LER 82-058/03L-0.Detailed Event Analysis Encl

Forwards LER 82-058/03L-0.Detailed Event Analysis Encl

ML20063M976
Person / Time
Site:	Salem
Issue date:	08/25/1982
From:	Midura H Public Service Enterprise Group
To:	Haynes R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20063M977	List: 05000272/LER-1982-058, Forwards LER 82-058/03L-0.Detailed Event Analysis Encl
References
NUDOCS 8209160421
Download: ML20063M976 (3)

LER-2082-058, Forwards LER 82-058/03L-0.Detailed Event Analysis Encl

Event date:
Report date:
2722082058R00 - NRC Website

text

,

' O >SEG Public Service Electric and Gas Company P.O. Box E Ilancocks Bridge, New Jersey 08038 Salem Generating Station August 25, 1982 Mr. R. C. Ilaynes Regional Administrator USNRC Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Ilaynes:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 82-058/03L Pursuant to the requirements of Salem Generating Station Unit No. 1, Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 82-058/03L. This report is required within thirty (30) days of the occurrence.

Sincerely yours,

// { "J 11 . J. Midura General Manager -

Salem Operations RF:ks y, 4 CC: Distribution 8209160421 820825 PDR ADOCK 05000272 S PDR The Energy People g*

% 2'f/> (20W 1181

e

• s Report Number: 82-058/03L Report Date: 08-25-82 Occurrence Date: 08-09-82 Facility: Salem Generating Station, Unit 1 Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

No. 12 Steam Generator Pressure Remote Shutdown Indication -

Inoperable.

This report was initiated by Incident Report 82-221.

CONDITIONS PRIOR TO OCCURRENCE:

Mode 3 - Rx Power 0 % - Unit Load 0 MWe.

DESCRIPTION OF OCCURRENCE:

At 2330 hours0.027 days <br />0.647 hours <br />0.00385 weeks <br />8.86565e-4 months <br />, August 9, 1982, during routine operation, a technician discovered that the No. 12 Steam Generator Pressure indication was reading zero at the remote shutdown panel; actual pressure was 1005 psig. The channel was declared in-operable, and Technical Specification Action Statement 3.3.3.5.a was entered.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The loss of No. 12 Steam Generator Pressure remote shutdown indication was due to the failure of a transistor in the instrument power supply. No recent failures of the power supply have been noted, and the problem was assumed to be of an isolated nature.

ANALYSIS OF OCCURRENCE:

Remote shutdown instrumentation is a design feature that ensures the facility can be shutdown and maintained in hot standby in the event of a loss of control room habitability.

The feature is in addition to Control Room design features, including shielding, non-combustible materials, fire barriers and air conditioning systems. These provisions ensure occupancy of the room under all conditions, including accidents analyzed l in the FSAR. No degradation of Control Room design features or habitability was involved in the occurrence. The incidence, therefore, did not involve any risk to the health and safety of the public. The event constituted operation in a degraded mode permitted by a limiting condition for operation, and is reportable in accordance with Technical Specification 6.9.1.9.b.

i l

LER 82-058/03L eu y ANALYSIS OF OCCURRENCE: (continued)

Action Statement 3.3.3.5.a requires:

With the number of operable remote shutdown monitoring channels less than required by the Technical Specifications, either restore the inoperable channel to operable status within 30 days 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 />.

CORRECTIVE ACTION:

The failed transistor was replaced and the channel calibration was satisfactorily performed. No. 12 Steam Generator Pressure remote shutdown channel was declared operable at 1625 hours0.0188 days <br />0.451 hours <br />0.00269 weeks <br />6.183125e-4 months <br />, August 10, 1982, and Action Statement 3.3.3.5.a was termi-nated. No further action was deemed necessary in view of the nature of the failure.

FAILURE DATA:

Hagan Corporation Power Supply Board lLQ-1645 Transistor 2N1671A Prepared By R. Frahm f/M h [ [vu d General Manager -

S 1 m Operations SORC Meeting No. 82-78 i

l

!