ML19340B161

RO 80-072/01X-0:on 801014,during Steady State Operation,Mgt Review Revealed That Reactor Protection Sys Trip Level Setting Was Miscalibrated to Nonconservative Level.Caused by Calculation Error.Monitors Were Immediately Recalibrated

ML19340B161
Person / Time
Site:	Pilgrim
Issue date:	10/15/1980
From:	Mcloughlin M BOSTON EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
RO-80-072-01X-0, RO-80-72-1X, NUDOCS 8010210554
Download: ML19340B161 (1)

Text

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TELECOPY MESSAGE

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215-337-5324 oct. 15,1980 .1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />.

Datd h 7 Telephone Number .

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1From: Pilgrim Nuclear Power Station TJ: Director, Region I .

Office of Inspection and Enforcemenc 'RFD #1 Rocky Hill Road-U. S. Nuclear Regulatory Commission- Plymouth, MA ~02360 631~ Park Avenue King cf Prussia, PA 19406 '.,_

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Subject:

PROMPT REPORTABLE OCCURRENCE-

. Docke licher 50;-293; License DPR-35

' Assigned LEE Number 80-072/01X-0-(Reported per Technical Specification 6.9.B.1.b)

. , # 6.9.B.I.b) .

Event'

Description:

October M,1980 a. management review revealed that a RPS trip <

level serting was m'iscalibrated 'to a non-conservative level. - The review indi-

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cated that on October 2', '1980 as a result of a calculation error the Main -

. , . Steam Line.High Radiation Monitors were set to 7.7 times normal full power -.

background. . .

Causa and Corrective Action:- The ' monitors were immediately recalibrated to d,"

.seven t'imes normal full power background as 'specified' in Technical

, Specification Table 3.1.L.

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' I7 e iPccility Status: 100 % Thermal MW c) Routine Scarcup ,

g) Shutdown j

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d) Routine Shutdown __

h) Refueling o). Steady' State *

'1) Other f) Load' Changing ..

j) Not Applicaple A. written follow-up report will be sent' within two weeks. .

MRC person notified & Jon Johnson ,

y;, pared by Mr. M. Thomas McLoughlin

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-Nail'(2)~ copies to: '

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. Office' of Management ,Information and Progrant Control

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in ton, D.C. 20555 -

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