ML20080A773

Ro:On 831128,from 830830-1128,seismic Monitoring Sys Inoperable.Caused by Personnel Oversight.Startup check-off List Modified to Require Maint Request

ML20080A773
Person / Time
Site:	Peach Bottom
Issue date:	01/16/1984
From:	Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
NUDOCS 8402060254
Download: ML20080A773 (2)

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PHILADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET P.O'. BOX 8699 PHILADELPHIA. PA.19101 (215)841-4000 January 16, 1984 Dr. Thomas E. Murley Office of Inspection and Enforcement

Region I U.S. Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406

Dear Dr. Murley:

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l Peach Bottom Atomic Power Station Technical Specifications 3.15 and 6.9.3.c provide for a report to be submitted if the seismic monitoring instrumentation is inoperable for more than 30 days. This report describes the inoperability of the seismic monitoring system for the period August 30, 1983, to its discovery on November 28, 1983. Due to administrative oversight in classifying this report, relative to the reporting time requirement, it is not being submitted within the spacified time period.

The leads from the containment foundation sensor to the transmitter had been temporarily disconnected to permit work associated with the Torus Attached Piping Modifications (Mark 1 modifications) on Unit 2. This out-of-service condition was observed during the scheduled performance of the 4 semi-annual functional test of the seismic monitoring system.

The sensor was reconnected and the functional surveillance test successfully completed. A review of the outstanding permits for Unit 2 was in progress, and the permit wculd have been cleared prior to startup of Unit 2 within a few days.

This oversight occurred because of the practice of assigning work or blocking required on common plant equipment to a Unit 2 maintenance request number or blocking permit.

When the Unit 3 maintenance requests and blocking permits were reviewed prior to the startup of Unit 3, this item was not addressed, since it was covered by a Unit 2 blocking permit.

To prevent a recurrence, the startup check-of f list is being modified to reauire the review of maintenance reauests and W

7 8402060254 840116 PDR ADOCK 05000277 S PDR h1D

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9 Dr. Thomas E. Murley Page 2 blocking permits on certain Unit 2 systems as well as those on Unit 3 prior to the startup of Unit 3.

Should you have any auestions, please do not hesitate to contact us.

Very truly yours, l}'

M. J. Cooney pp Suddrintendent Nuclear Generation Division cc: A. R. Blough, Site Inspector

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