05000219/LER-1982-037, Forwards LER 82-037/01T-0.Detailed Event Analysis Encl

From kanterella
Jump to navigation Jump to search
Forwards LER 82-037/01T-0.Detailed Event Analysis Encl
ML20062G988
Person / Time
Site: Oyster Creek
Issue date: 08/03/1982
From: Fiedler P
GENERAL PUBLIC UTILITIES CORP.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20062G990 List:
References
NUDOCS 8208130255
Download: ML20062G988 (3)


LER-2082-037, Forwards LER 82-037/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2192082037R00 - NRC Website

text

-- . _ __ ______________

GPU Nuclear

{' g g7 P.O. Box 388 Forked River, New Jersey 08731 ,

609-693-6000 l Wnters Direct Dial Number: j August 3, 1982 Mr. Ronald C. Haynes, Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Mr. Haynes:

Subject:

Oyster Creek Nuclear Generating Station Docket No. 50-219 Licensee Event Report Reportable Occurrence No. 50-219/82-37/OlT This letter forwards three copies of a Licensee Event Report to report Reportable Occurrence No. 50-219/82-37/OlT in compliance with paragraph 6 9 2.a.6 of the Technical Specifications.

Very truly yours, Ak.]

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

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

Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washingttn, D.C. 20555 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731 8208130255 820803 PDR ADOCK 05000219 r 1 S PDR j L; M GPU Nuclear is a part of the General Public Utilities System

0YSTER CREEK NUCLEAR GENERATING STATION

- Forked River, New Jersey . 08731 Licensee Event Report Reportable Occurrence No.' 50-219/82-37/OlT Report Date August 3, 1982 l

)

Discovery Date_-

July 19, 1982 Identification of Occurrence On July 19,1982, .it was identified that a procedural error . existed which removed the capability to automatically isolate an Isolation Condenser as required by Technical Specifications, Table 3 1.l. Item H. .

This event is considered to be a Reportable Occurrence as defined by Technical Specifications, paragraph 6 9 2.a.6.

Conditions Prior to Occurrence The plant was in various operating modes during the time the condition existed.

Description of Occurrence During the performance of the Isolation Condenser Isolation Test and:

Calibration (Procedure 609 3 002), the first actions the ' operators take is to open the supply breakers for the normally open valves, thus preventing .

automatic-isolation of the system. This is done because the logic for isolation is a one out of four, and a test of any one sensor will initiate isolation. This procedural error will inhibit the automatic isolation function of the affected isolation condenser.

! Apparent Cause of Occurrence I . -

The cause of. the occurrence is attributed to procedural inadequacy.

Analysis of Occurrence The purpose of the isolation condenser is to depressurize the reactor and to remove decay heat and uaintain water inventory in'the event the main condenser is unavailable as a heat sink. The line break sensors isolats the system if a pipe rupture should occur during operation.

~. t.

Licensee Event Report Page.2.

Reportable Occurrence No. 50-219/82-37/OlT --

However, under the precautions _ and limitations section of Procedure 609 3 002, the need for operator manual action was recognized as follows: "During periods-that the isolation condenser isolation valves supply breakers are open, when the isolation condensers are required to be operable, operators shall stand by at respective motor control centers to close supply breakers immediately upon command from control room." The possibility exists that during a ; pipe rupture the operator could not perform this function at the local motor control centers. The isolation function would then be rendered inoperable.

Corrective Action The' procedure will be revised to alter the method of testing and place the isolation condenser under test in a safe (isolated) condition as allowed by Technical Specifications, Table 3 1.1, Item H.

Additionally, all other surveillance procedures of this nature will be reviewed to determine whether or not a similar situation exists.

,, , w-n p