ML20140G519

Forwards Results of Level I Investigation at Zion Station. Rept Documents Circumstances & Causes of Shutdown of Station on 970221

ML20140G519
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	04/18/1997
From:	Mueller J COMMONWEALTH EDISON CO.
To:	Beach A NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20140G524	List: ML20140G519 ML20140G527
References
CAL-RIII-97-02, CAL-RIII-97-2, NUDOCS 9705120006
Download: ML20140G519 (2)

Text

Commonwealth lihson Gmp.tny Zion Generating Station 101 Shiloh floulev.trd rion.n.a m > n n Tei mcw2os s April 18,1997 Mr. A. B. Beach Regional Administrator NRC Region Ill 801 Warrenville Road Lisle, Illinois 60532-4351

Subject:

February 21,1997, Reactivity Management Event Investigation Report; Zion Nuclear Powcr Station Units 1 and 2; NRC Docket Numbers 50-295 and 50-304

Reference:

Confirmatory Action Letter, RIII-97-002, from A. B. Beach (USNRC) to J. H. Mueller (Comed), dated February 25,1997 e

i

Dear Mr. Beach:

As a result of the reactivity management concerns involved in the shutdown of Zion Station Unit I on February 21, 1997, Commonwealth Edison (Comed) initiated an investigation into the circumstances and causes of the event. A multidisciplinary team from the Braidwood, Dresden, and Zion Stations was assembled under the direction of i

John C. Brons, Vice President of Nuclear Support. The team's investigation was also observed by representatives of the Institute of Nuclear Power Operations (INPO).

The team has concluded its investigation and has issued its report, "Results of Level I Investigation at Zion Station", dated April 18,1997, a copy of which is enclosed. This report provides the investigation team's findings and conclusions regarding the actions taken during the Unit I shutdown on February 21,1997. The investigation has identified a number ofissues concerning supervisory oversight, communications, and execution of on-shift crew responsibilities.

To address weaknesses in Operations performance, Zion Station has performed an assessment of Operations Department personnel, including both management and union r staff, and has developed an intensive training program to improve Operations performance.

These activities are part of a comprehensive plan to improve performance in Operations, support for Operations, and management systems. We will review this report and (

implement additional actions, as warranted, to address its findings. The NOD is also

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i April 18,1997 i page 2 of 2 formulating a plan to ensure that the lessons to be learned from this event are understood i at all six of Comed's nuclear stations. i 4

) The completion of the investigation satisfies commitment (2) of the Referenced letter.

j' Submitting this report to you also satisfies, in part, commitment (4) of the Referenced letter which requires that our investigation results be' documented and provided to the

NRC for review.

If you have any questions or desire further information, please contact me at 847 746-

2084 extension 3600.

l Sincerely,  !

l l

John H. Mueller AI - l l  :

Site Vice President

Zion Station

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i j Enclosure 1

cc: Senior Project Manager, USNRC - NRR Project Directorate III-2 Senior Resident Inspector, Zion Nuclear Station j Office of Nuclear Facility Safety - JDNS  !

i NRC Document Control Desk l 4 )

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