ML20128D945

Forwards Probabilistic Risk Assessment Based Insp Rept 50-293/92-81 on 921130-1218 & Notice of Violation

ML20128D945
Person / Time
Site:	Pilgrim
Issue date:	02/03/1993
From:	Hodges M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	Boulette E BOSTON EDISON CO.
Shared Package
ML20128D950	List: IR 05000293/1992081 ML20128D945 ML20128D991
References
NUDOCS 9302100272
Download: ML20128D945 (4)

See also: IR 05000293/1992081

Text

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FEB 31993

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Docket No. 50-293 l

Dr. E. Thomas Boulette f

Acting Senior Vice President-Nuclear l

Pilgrim Nuclear Power Station l

Boston Edison Company  !

RFD #1 Rocky Hill Road ,

Plymouth, Massachusetts 02360 l

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Dear Dr. Boulette:

SUBJECT: PROBABILISTIC RISK ASSESSMENT BASED INSPECTION OF THE

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EMERGENCY DIESEL GENERATORS AND THE HIGH PRESSURE

COOLANT INJECTION SYSTEMS (NRC INSPECTION REPORT

50-233/92-31) {

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This letter re'ers to the Probabilistic Risk Assessment Based Inspection conducted by

Mr. James Trapp and other NRC staff on November 30 through December 18,1992. The

inspection included a review of activities authorized for your Pilgrim Nuclear Power Station, l

in Plymouth, Massachusetts. At the conclusion of the inspection, the team findings were

discussed with you and other members of your staff on December 18, 1992. The purpose of

this inspection was to verify that the emergency diesel generators and the high pressure 4

coolant injection system were being operated, maintained, tested and modified in a manner

which ensured that the systems were reliable and capable of performing their intended safety

function if called upon to operate.

Areas examined during the inspection are discussed in the enclosed inspection report. Within

these areas, the inspection consisted of selective examinations of procedures, installed plant

modifications, equipment maintenance, conduct of surveillance testing, operator performance,

and observations by the inspectors. The emergency diesel generators and the high pressure

coolant injection system were selected for this inspection based on their relatively high

. importance to safety as described in Pilgrim's probabilistic risk assessment. Based on the

information reviewed, the team concluded that the emergency diesel generators and the high

pressure coolant injection system were being operated, maintained, tested, and modified in a

manner which assured operability and reliability.

9302100272 930203 3-

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FEB 0 3 '1993

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Dr. E. Thomas Boulette 2

Th. team noted that efforts were being made to improve reliability. These efforts include

modifications to the emergency diesel generator starting air and turbo-boost air systems.

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Strengths were noted in the functional testing of the emergency diesel generator logic relays

and the inservice testing of valves. Licensed operator performance observed during

surveillance testing and walkdown of in plant procedures was strong. - Overall, the team j

concluded that controls provided for the operation, maintenance, surveillance and design

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changes for the systems reviewed were technically sound and thoroughly implemented.

Based on the results of this inspection, two of your activities appeared to be in violation of

NRC requirements, as specified in the enclosed Notice of Violation (Notice). The first

violation was the failure to adequately control the position of a ventilation damper located in  :

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the emergency diesel generator building. A manually operated exhaust damper was identified

by the team as being closed when the damper should have been open. The second violation

was the inadequate corrective action taken in response to repetitive emergency diesel

generator fuel oil booster pump V-belt failures. The V-belts have been periodically failing

since the emergency diesel generators were installed, with the last failure occurring dudng

this inspection. While the interim corrective action has been somewhat successful in

reducing the belt failures, the permanent corrective action to improve the fuel oil booster

pump design had been delayed. Your response to this Notice should follow the instructions

provided in the Appendix.

Your cooperation with us in this matter is appreciated.

Sincerely,

Origind Cicm ' E

i"arvin W.1L;

Marvin W. Hodges, Director

Division of Reactor Safety

Enclosures:

1. Appendix A, Notice of Violation

2. NRC Region I Inspection Report Number 50-293/92-81

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FEB 0 31993

Dr. E. Thomas Boulette 3

cc w/ encl:

E. Kraft, Acting Vice President, Nuclear Operations and Station Dimetor

L. Schmeling, Plant Manager

V. Oheim, Manager, Regulatory Affairs and Emergency Planning Department

D. Tarantino, Nuclear Information Manager

N. Desmond, Compliance Division Manager

R. Hallisey, Department of Public Health, Commonwealth of Massachusetts

R. Adams, Department of Labor and Industries, Commonwealth of Massachusetts

The Honorable Edward M. Kennedy

The Honorable John F. Kerry

The Honorable Edward J. Markey

The Honorable Terese Murray

The llonorable Peter V. Forman

B. Abbanat, Department of Public Utilities

Chairman, Plymouth Board of Selectmen

Chairman, Duxbury Board of Selectmen

Plymouth Ciyil Defense Director

Paul W. Gromer, Massachusetts Secretary of Energy Resources

Sarah Woodhouse, Legislative Assistant

A. Nogee, MASSPIRG

Regional Administrator, FEMA

Office of the Commissioner, Massachusetts Department of Environmental Quality

Engineering

Office of the Attorney General, Commonwealth of Massachusetts

T. Rapone, Massachusetts Executive Office of Public Safety

Chairman, Citizens Urging Responsible Energy

Public Document Room (PDR)

Local Public Document Room (LPDR)

Nuclear Safety Information Center (NSIC)

K. Abraham, PAO (2)

NRC Resident Inspector

Commonwealth of Massachusetts, SLO Designee

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FEB 031993

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.. Dr. E. Thomas Boulette 4

bec w/ encl:

Region I Docket Room (with concurrences and IFS Forms) .

DRS/EB SALP Coordinator '

J. Linville, DRP

E. Kelly, DRP _ "

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J. Macdonald, SRI - Pilgrim (with concurrences and IFS Forms)

W. Butler, NRR

R. Eaton, NRR

V. McCree, OEDO

W. l2nning, DRS

bec w/ Letter and Executive Summary Only (and Enclosure 1 - to be used with an NOV)

T. Martin,- RA

W. Kane, DRA

C. Hehl, DRP

J. Wiggins, DRP

D. Holody, EO

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