ML20059D778
| ML20059D778 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 12/23/1993 |
| From: | Hodges M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Boulette E BOSTON EDISON CO. |
| Shared Package | |
| ML20059D783 | List: |
| References | |
| NUDOCS 9401100078 | |
| Download: ML20059D778 (4) | |
See also: IR 05000293/1993080
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DEC 2 31993
Docket No. 50-293
E. Thomas Boulette, PhD
Senior Vice President - Nuclear
Boston Edison Company
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Pilgrim Nuclear Power Station
Rocky Hill Road
Plymouth, Massachusetts 02360
Dear Dr. Boulette:
SUBJECT:
NRC PILOT STATION BLACKOUT TEAM INSPECTION, NRC
INSPECTION REPORT NO. 50-293/93-80
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The enclosed report refers to the announced Pilot Station Blackout Team Inspection, led by
Mr. Leonard Cheung of this office, on October 18 through October 23,1993, at the Pilgrim
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Nuclear Power Station in Plymouth, Massachusetts. The purpose of this inspection was to
review your programs, procedures, training, equipment and systems and supporting
documentation for implementing the Station Blackout Rule,10 CFR 50.63. At the
conclusion of the inspection, the team's findings were discussed with members of your staff
identified in the enclosed report. In addition, the status of the inspection findings was
discussed between Mr. R. Gay of your staff and Mr. L. Cheung of this office during a
subsequent telephone conversation on December 10, 1993.
This inspection was the second pilot station blackout inspection to be conducted in Region I.
The inspection team was comprised of headquarters and regional staff and used temporary
instruction TI 2515/120 for specific inspection guidance. The actions taken to implement the
station blackout rule are safety significant because many of the systems required for decay
heat removal and containment cooling are dependent on the availability of alternating current
(ac) power. In the event of a station blackout, relatively few systems that do not require ac
power are depended upon to remove decay heat, until ac power is restored. The
consequence of the failure of this equipment to operate could be severe. During this
inspection, the team also reviewed the interface of the 23 kV system (shutdown transformer)
with the station blackout alternate alternating current source.
The team concluded that generally appropriate actions had been completed to implement the
station blackout rule, except that: 1) the reliability value of the station blackout diesel
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generator did not meet NUMARC 87.00, Appendix B, riterion B.13; and 2) a
comprehensive maintenance program, as specified in NUMARC 87.00, Appendix B,
Criterion B.11 was not yet established. These are considered unresolved items. The team
identified two additional unresolved items as a result of reviewing the 23 kV system. The
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Boston Edison Company
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Grst item pertains to the lack of degraded voltage protection when emergency buses A5 and
A6 are powered by the 23 kV system. This is important because the safety-related motors
connected to bus A5 or bus A6 could be damaged before the station blackout condition is
declared. The second item relates to whether the 23 kV transmission line is used for meeting
General Design Criteria (GDC) 17 requirements. The technical speci5 cations take credit for
this power source, but no analytical documents were available to substantiate the quality of
the 23 kV source for GDC 17 application. You are requested to provide to us, in writing,
within 60 days of the receipt of this letter, a schedule for the resolution of these four
unresolved items which are also listed in the Executive Summary.
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In accordance with 10 CFR 2.790 of the NRC's " Rules of Practice," a copy of this letter and
the enclosure will be placed in the NRC Public Document Room.
The responses requested by this letter and the enclosed Notice are not subject to the
clearance procedures of the Office of Management and Budget as required by the Paperwork
Reduction Act of 1908, Pub. L.96-511.
Your cooperation with us in this matter is appreciated.
Sincerely,
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Marvin W. Hodges, Director
Division of Reactor Safety
Enclosure: NRC Region 1 Inspection Report No. 50-293/93-80
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DEC 2 31993
Boston Edison Company
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cc w/ encl:
E. Kraft, Vice President, Nuclear Operations and Station Director
L. Schmeling, Plant Department Manager
V. Oheim, Manager, Regulatory Affairs and Emergency Planning Department
D. Tarantino, Nu:: lear 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
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The Honorable Edward J. Markey
The Honorable Terese Murray
The Honorable Peter V. Forman
B. Abbanat, Department of Public Utilities
Chairman, Plymouth Board of Selectmen
Chairman, Duxbury Board of Selectmen
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Plymouth Civil Defense Director
Paul W. Gromer, Massachusetts Secretary of Energy Resources
Sarah Woodhouse, Ixgislative 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)
Ixcal 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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DEC. 2 3'l993
Boston Edison Company
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bec w/ encl:
Region I Docket Room (with concurrences)
E. Kelly, DRP
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J. Shedlosky, DRP
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bec w/ encl: (VIA E-MAIL)
W. Butler, NRR
R. Eaton, NRR
w. Dean, OEDO
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P. Gill, NRR
A. Pal, NRR
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