ML20127L949
| ML20127L949 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 05/17/1985 |
| From: | Grace J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Richard J MISSISSIPPI POWER & LIGHT CO. |
| Shared Package | |
| ML20127L953 | List: |
| References | |
| RTR-REGGD-01.063, RTR-REGGD-1.063 EA-85-020, EA-85-20, NUDOCS 8507010018 | |
| Download: ML20127L949 (5) | |
See also: IR 05000416/1984054
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sA REGg
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NUCLEAR REGULATORY COMMISSION
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MAY 171985
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Mississippi Power and Light Company
ATTN:
Mr. J. B. Richard
Senior Vice President, Nuclear
P. O. Box 23054
Jackson, MS 39205
Gentlemen:
SUBJECT:
NOTICE OF VIOLATION:
EA 85-20
(NRC INSPECTION REPORT NO. 50-416/84-54)
.
On December 6 - 17, 1984, the Nuclear Regulatory Commission (NRC) staf f
conducted-a special inspection of activities authorized by NRC Operating License
No. NPF-29 for Grand Gulf Unit 1.
This. inspection specifically concerned the
failure of Grand Gulf Unit 1 to meet the over-current protection requirements for
circuits that penetrate containment after an earlier Mississippi Power and Light
Company (MP&L) review had indicated that the requirements were satisfied.
The
.
NRC, in a meeting with MP&L on December 17, 1984, reviewed the circumstances
surrounding the identified violation and MP&L's proposed corrective actions.
The
violation is described below and in the enclosed Notice of Violation.
MP&L discovered a problem in August 1984, regarding the adequacy of over-current
protection of- electrical circuits penetrating containment at Grand Gulf Unit 1.
In'a letter dated September 10, 1984, MP&L reported the corrective action taken
and stated that no additional discrepancies were found after conducting a complete
review of all circuits penetrating the primary containment.
Subsequently, while
conducting an engineering design review of Unit 2 in late November and early
--
December 1984, MP&L identified additional discrepancies applicable to Unit-1.
These additional discrepancies revealed a lack of compliance regarding redundant
over-current protection of containment penetrations as specified in Regulatory
Guide (RG) 1.63 and as described in the Grand Gulf Final Safety Analysis Report
(FSAR). _ In addition, MP&L found that 52 low voltage control circuit breakers
for which credit was taken for penetration protection were not in the plant
Technical Specifications.
The apparent cause of the late discovery of these discrepancies was the reliance
of MP&L upon an engineering review that was not thorough.
The August 1984
review was not an in-depth review in that it did not look at Category 6 and 7
circuits (low voltage instrumentation circuits) since these categories were believed
to be inherently self-limiting and of such low power as to be of no concern.
However, a number of circuits placed in Categories 6 and 7 had a significant
power requirement and should not have been placed in these lesser categories.
Consequently, the August 1984 review did not identify certain circuits in these
categories for which over-current protection was deficient.
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The safety significance of the discrepancies was low.
The circuits found to be
deficient were relatively small diameter conductors (maximum of No.12 AWG wire)
and carried currents of low energy levels.
Therefore, the penetrations were
unlikely to fail in a manner that would result in exceeding Technical Specifi-
cation limits.
The violation described in the enclosed Notice has been categorized as a Severity
Level III violation in accordance with the " General Statement of Policy and
Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C, as revised,
49 FR 8583 (March 8, 1984).
Although civil penalties are usually proposed for
Severity Level III violations, we have not proposed a penalty in this instance
since the NRC issued a Notice of Violation and Proposed Imposition of Civil
Penalties in the amount of 5125,000 to MP&L on March 21, 1985, for violations
involving material false statements regarding Technical Specifications (EA S4-75)
which should ensure that you devote the necessary attention to correct the
problem of incomplete and inaccurate submittals to the NRC. We will closely
follow your corrective actions to ensure that information provided to the NRC is
complete, thorough, and accurate. We emphasize that similar violations in the
future may result in additional enforcement action.
You are required to respond to this letter and should follow the instructions
specified in the enclosed Notice when preparing your response.
In your response,
-
you should document the specific actions taken and any additional actions you
plan to take to prevent recurrence. After reviewing your response to this Notice
of Violation, including your proposed corrective actions, the NRC will determine
whether further NRC enforcement action is necessary to ensure compliance with
NRC regulatory requirements.
In accordance with Section 2.790 of the NRC's " Rules of Practice," Part 2,
Title 10, Code of Federal Regulations, a copy of this letter and its enclosures
will be placed in NRC's Public Document Room.
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The responses directed by this letter and its enclosures are not subject to the
clearance procedures of the Of fice of Management and Budget as required by the
Paperwork Reduction Act of 1980, PL 96-511.
Should you have any questions concerning this letter, please contact us.
Sincerely,
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. Nelson Grace
Regional Administrator
Enclosures:
1.
2.
Inspection Report No. 50-416/84-54
cc w/encls:
(see page 3)
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J. E. Cross, General Manager
R. T. Lally,' Manager of-Quality
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Middle South Services, Inc.
R. B. McGehee, Esquire
Wise, Carter, Child, Steen and Caraway
N. S. Reynolds, Esquire
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R..W.- Jackson, Project Engineer-
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