ML19340B161

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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)


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~ BOSTON EDISON COMPANT 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 />.

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Telephone Number

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

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

Specification Table 3.1.L.

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iPccility Status:

100 % Thermal MW c) Routine Scarcup g) Shutdown j

d) Routine Shutdown h) Refueling o). Steady' State

'1) Other

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

Jon Johnson MRC person notified y;, pared by Mr. M. Thomas McLoughlin

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