ML20062G808

Supplemental RO 369/82-13:due to Ambiguity in Procedure to Recalibr Level Switches for Upper Head Injection Train a Isolation Valves,Switches Set at 73.8 Plus/Minus 0.25 Inches Rather than 73.3 Plus/Minus 0.25 Inches

ML20062G808
Person / Time
Site:	McGuire
Issue date:	08/04/1982
From:	Tucker H DUKE POWER CO.
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
RO-369-82-13, NUDOCS 8208130175
Download: ML20062G808 (1)

Text

r DUKE POWEIt COMPANY STEAM PHODUCTION DEPr.

GENERAL OFFICES 7staru k , ansa yo4 P. o. sox astso 422 SOUTH CHURCH STREET 7 373 doss, CHAHLO'ITE, N. C. 28242 .:: 0:.

O ho August 4, 1982 b I %,

3

. iL C S-Mr. James P. O'Reilly, Regional Administrator o _.

U. S. Nuclear Regulatory Commission -

Region II

~

101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Re: McGuire Nuclear Station Unit 1 Docket No. 50-369

Dear Mr. O'Reilly:

The following is additional information relating to Reportable Occurrence Report R0-369/82-13 which was submitted by Mr. W. O. Parker, Jr.'s letter of February 25, 1982. The original report is still applicable.

Due to an ambiguity in the procedura used to recalibrate the level switches for UHI "A" Train isolation valves folluwing the subject incident, the switches were set incorrectly. The switches were set at 73.8 .25 inches, instead of 73.3 i

.25 inches. The procedure has since been revised to clearly state the required setpoint both in the body of the procedure and on the data sheet. The switches were recalibrated to the correct setpoint on March 11, 1982.

Since this affected only Train "A" components and the level switches were only slightly miscalibrated, the capability to isolate the UHI accumulator was con-tinuous and the safety function of the accumulator was never compromised. Safe plant operation and the healt': and safety of the public were not jeopardized.

Very truly yours,

& c H. B. Tucker, Vice President Nuclear Production PBN/jfw cc: Director Records Center Office of Management and Program Analysis Institute of Nuclear Power Operations U. S. Nuclear Regulatory Commission 1820 Water Place Washington, D. C. 20555 Atlanta, Georgia 30339 Mr. P. R. Bemis Sr. Resident Inepector-NRC McGuire Nuclear Station 8208130175 820804 ,#__ OFFICIALCOPM

~ ~ ~ ~ ~

PDR ADDCK 05000369 S pDR S bh