ML20012F517

Special Rept 90-02:on 900309,stack Radioactive Effluent Monitoring Sys High Range Monitor Not Repaired within 7 Days,Per Tech Spec 3.13.H.Caused by Acceptance Criteria Test Procedure.Test Procedure Revised

ML20012F517
Person / Time
Site:	Oyster Creek
Issue date:	04/03/1990
From:	Fitzpatrick E GENERAL PUBLIC UTILITIES CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
90-02, 90-2, NUDOCS 9004160056
Download: ML20012F517 (2)

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~ GPU Nuoleer Corporation ' i g f Post Office Box 388

. Route 9 South  !

Forked River, New Jersey 08731-0388  ;

609 971 4000 Writer's Direct Dial Number:

April 3,1990

'I U.S. Nuclear Regulatory Commission

• Attne Document Control Desk Washington, DC 20555 , -l

.i Dear Sir [

Subjects Oyster Creek Nuclear Generating Station l Docket No. 50-219 Special Report No. 90-02 Enclosed is one copy of Special Report No. 90-02. This. report is required by' Technical Specification 3.13.H. If there are any questions or comments please .)

contact Mr. Michael Heller, OC Licensing Engineer at (609)971-4680.  ;

i Very truly yours,

'E E. E. Fitzpatrick f

Vice President & Director

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Oyster Creek EEF/MH/dmd Attachment cc: Administrator i

US NRC  !

l 475 Allendale Road ,

King of Prussia, PA 19406 Mr. Alex W. Dromerick I; US NRC .i l Washington, DC 20555 NRC Resident Inspectors oyster Creek Nuclear Generating Station 9004160036 900403 PDR S

ADOCK 050002J9 PDC if r l

GPU Nuclear Corporationis a subsidiary of the General Public Utilities Corporation l- _.

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SPECIAL REPORT 90-02  :

Epport Date: {

April 3,1990 '  !

l Decurrence Date March 9, 1990 ,

Identification of Occurrences l i

The stack RAGEMS (Radioactive Gaseous Effluent Monitoring System) High  ;

Range Monitor was not repaired within seven (7) days as required by Technical Specification 3.13.H. ,

5 Descriotion of occurrenggs i

During a routine surveillance of the stack and turbine building RAGEMS High Range Monitor, the RAGEMS printer value for stack RAGEMS was identified as not meeting the acceptance criteria. The stack RAGEMS High Range Monitor was declared inoperable. <

ADA l vais of occurrence:

The RAGEMS printer value for the stack RAGEMS check source reading does not +

consistently fall within the acceptance criteria specified. A short form +

was submitted to investigate and repair the RAGEMS computer. [

Corrective Action:

After thoroughly testing the stack RAGEMS High Range Monitor and associated j computer system, it was determined that the instrument was responding within its limitations and that the instruments and software were '

functioning properly. It was concluded that the fault lay in the '

acceptance critoria of the test procedure. It was decided to establish a e sigma value through a series of surveillances done over a 30-day time period to obtain statistically accurate acceptance criteria values. The acceptance criteria for the procedure will then be changed to reflect this result. The High Range Monitor was returned to service on March 20, 1990.

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