ML20128D945
| 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: |
| References | |
| NUDOCS 9302100272 | |
| Download: ML20128D945 (4) | |
See also: IR 05000293/1992081
Text
hb
-
,
1
'
FEB
31993
i
l
Docket No. 50-293
l
f
Dr. E. Thomas Boulette
Acting Senior Vice President-Nuclear
l
Pilgrim Nuclear Power Station
l
Boston Edison Company
!
RFD #1 Rocky Hill Road
,
Plymouth, Massachusetts 02360
l
!
Dear Dr. Boulette:
I
SUBJECT:
PROBABILISTIC RISK ASSESSMENT BASED INSPECTION OF THE
EMERGENCY DIESEL GENERATORS AND THE HIGH PRESSURE
I
{
COOLANT INJECTION SYSTEMS (NRC INSPECTION REPORT
50-233/92-31)
l
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
DR
ADOCK 0500
3-
/
.
(#
'
.
_ _ .
_
,
.
FEB 0 3 '1993
v
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.
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
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
'
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
___ __ __ _ _
__ _ __- __- - -
.
.
,
4
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
I
- - - - _ _ _ _ _ _ _ _ _ _ _ _ _
.
.
FEB 031993
=-
.. 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 _
.
"
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
. -
RI:DRS
RI:DRS
RI:DRS
RI:DRS
T
dy
Durr
I
,
I#493
- 1/U/93
2//J93
-2/3/93
'
OFFICIAL RECORD COPY
A:PIL9281.JT
--
'
_
-