ML16341G619
| ML16341G619 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 06/19/1992 |
| From: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| Shared Package | |
| ML16341G618 | List: |
| References | |
| 50-275-92-17, 50-323-92-17, NUDOCS 9207100200 | |
| Download: ML16341G619 (4) | |
Text
NOTICE OF VIOLATION Pacific Gas and Electric Company Diablo Canyon Nuclear Power plant Docket Nos.
50-275 and 50-323 License Nos.
DPR-80 and DPR-82 During NRC inspections conducted March 17 through April 27, 1992, violations of NRC requirements were identified.
In accordance with the "General State-ment of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2,
,Appendix C, the violations are listed below:
A.
Section 6.8.1 of the Diablo Canyon Technical Specifications requires the licensee to establish and implement procedures for the activities recom-mended in Appendix A of Regulatory Guide 1.33, Revision 2, 1978.
Section 9.a of Appendix A to Regulatory Guide 1.33, Revision 2, states that appropriate procedures or instructions should be provided for maintenance activities that can affect the performance of safety-related equipment.
Work Orders
- R0063770, R0064110,
- R0064103, R0063296, and R0063768 provided instructions to inspect,
- clean, and lubricate Unit 1 containment fan cooler units (CFCU) in February and March 1991.
The work orders referenced American Warming and Ventilation drawings SHW-D-9098, Revision F,
and 9099, Revision B (DCPP Drawings 663079-38/38),
for proper assembly details for containment fan cooler unit (CFCU) backdraft dampers.
Contrary to the above, the work order instructions were not implemented for maintenance of CFCUs as follows:
B.
Counterweights were installed without sufficient clearance for free movement in a slotted hole in the lever arm (all Unit 1
CFCUs).
Damper linkage bars were assembled in a reverse configuration (CFCU 1-5).
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The linkage bar was placed on the wrong side of the linkage arm, causing binding of the damper (CFCUs l-l and 1-5).
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Washers were used although none were specified in design drawings (CFCU 1-2).
This is a Severity Level IV violation (Supplement I), applicable to Unit 1.
Section 6.8.1 of the Diablo Canyon Technical Specifications requires the licensee to establish and implement procedures for the activities recommended in Appendix A of Regulatory Guide 1.33, Revision 2, 1978.
Section 8.b of Appendix A to Regulatory Guide 1.33, Revision 2, states that appropriate procedures or instructions should be provided for the.
performance of inspections that can affect the performance of safety-QQ+g p~~
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related equipment.
Contrary to the above, the licensee's inspection of Unit 2 CFCUs on March 7 and 8, 1992 was conducted without appropriate procedures, and incorrectly concluded that CFCUs 2-2 and 2-5 were assembled correctly.
This is a Severity Level IV violation (Supplement I), applicable to Unit 2.
C.
10 CFR Part 50, Appendix B, Criterion XVI, requires that measures be established to assure that conditions adverse to quality, such as defective equipment, are corrected.
Contrary to the above, from March 27, 1991 until February 22, 1992, the licensee failed to correct a condition involving reverse rotation of CFCU 1-5, a condition adverse to quality.
Correction of this problem could have led to the discovery of similar problems with the backdraft dampers associated with three other containment fan cooler units.
This is a Severity Level IV violation (Supplement I), applicable to Unit 1.
Pursuant to the provisions of 10 CFR 2.201, Pacific Gas and Electric Company is hereby required to submit a written statement or explanation to the U.S.
Nuclear Regulatory Commission, ATTN:
Document Control Desk, Washington, DC 20555 with a copy to the Regional Administrator, Region V, and a copy to the NRC Resident Inspector, Diablo Canyon, within 30 days of the date of the letter transmitting this Notice.
This reply should be clearly marked as a
"Reply to a Notice of Violation" and should include for each violation:
(1) the reason for the violation or, if contested, the basis for disputing the violation, (2) the corrective steps that have been taken and the results
- achieved, (3) the corrective steps that will be taken to avoid further violations, and (4) the date when full compliance will be achieved.
If an adequate reply is not received within the time specified in this Notice, the Commission may issue an order or demand for information as to why the license should not be modified, suspended, or revoked or why such other actions as may be proper should not be taken.
Where good cause is shown, consideration will be given to extending the response time.
Dated at Walnut Creek, California 991 yddd 9 9 9~,
1992