05000219/LER-1982-041, Forwards LER 82-041/01T-0.Detailed Event Analysis Encl

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Forwards LER 82-041/01T-0.Detailed Event Analysis Encl
ML20062B854
Person / Time
Site: Oyster Creek
Issue date: 07/23/1982
From: Fiedler P
GENERAL PUBLIC UTILITIES CORP.
To: Haynes R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20062B857 List:
References
NUDOCS 8208050084
Download: ML20062B854 (3)


LER-2082-041, Forwards LER 82-041/01T-0.Detailed Event Analysis Encl
Event date:
Report date:
2192082041R00 - NRC Website

text

GPU Nuclear h ', g gf P.O. Box 388 Forked River, New Jersey 08731 609-693-6000 Wnter's Direct Dial Number.

July 23, 1982 Mr. Ronald C. Haynes, Administrator Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Mr. Haynes:

Subj ect: Oyster Creek Nuclear Generating Station Docket No. 50-219 Licensee Event Report Reportable Occurrence No. 50-219/82-41/01T This letter forwards three copies of a Licensee Event Report to report Reportable Occurrence No. 50-219/82-41/OlT in compliance with paragraph 6.9 2.a.2 of the Technical Specifications.

Very truly yours, 2

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

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

Of fice of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, D.C. 20555 NRC Resident Inspector Oyster Creek Nuclear Generating Station Forked River, NJ 08731 8208050084 820723 PDR ADOCK 05000219 S PDR GPU Nuclear is a part of the General Public Utilities System @

, OYSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 i Licensee Event Report i Reportable Occurrence No. 50-219/82-41/01T l

I

. Report Date l

4 July 23, 1982  ;

Occurrence Date July 7 and 8, 1982 i .

Identification of Occurrence On two occasions, July 7 and July 8,1982, the stack gas was not continuously i

monitored as required by Technical Specification 3.6. A.3 due to an electrical overload trip of the stack gas sample pump 'B' .

-This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6 9 2.a.2.

) Conditions Prior to Occurrence Power: Reactor - 1482 MWt 485 MWe i The' plant was critical in the run mode.

Description of Occurrence 4

On July 7 and July 8,1982, the 'B' stack gas sample pump electrically tripped it's breaker, at which time the stack gas flow through the stack gas sample i

system decreased to zero SCFM. The system was returned- to operation on July 7 by resetting the breaker in question.

For the occurrence on July 8, ' A' stack gas sample pump was put into service.

4-

{ Apparent Cause of Occurrence f Apparently both occurrences resulted from an electrical trip of the heater i

overload protector on the motor controller. In both cases, the high ambient temperature (approximately 1100F) caused a thermal preload on the overload ~

p rotector. This, in turn, affected the calibration of the overload protector

allowing it to trip at a lower operating amperage.

i 1

i i

i Licensee Event Report Page 2 i Reportable Occurrence No. 50-219/82-41/olT Analysis of Occurrence

]

.;' The Stack Gas Sampling System monitors radioactive gaseous effluents released from the stack. Since the local radiation monitors and the off-gas radiation monitors showed no change before, during, and af ter the occurrence, the safety

, significance of this event is considered minimal.

f Corrective Action ,

Ventilation of the Stack Gas Sampling Panel area has been improved with the use i of a fan. Furthermore, the heater overload Square 'D' B-22 was replaced with l one better suited for the higher ambient temperature (Square 'D' L-25).

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