ML20210H223
| ML20210H223 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 03/19/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-6-026, 2NRC-6-26, 86-03, 86-3, NUDOCS 8604030011 | |
| Download: ML20210H223 (2) | |
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'Af 2NRC-6-026 M
(412) 787-5141 Telecopy (412) 7 - 29 Plaza B Id g Suite 210 Pittsburgh. PA 15205 March 19, 1986 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION: Dr. Thomas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 Incorrect Material in Paul-Monroe Snubber Brackets Potential Significant Deficiency Report 86-03 Gentlemen:
This Potentially Reportable Significant Deficiency Report relating to incorrect material in the manuf acturing. of Paul-Monroe (PDM)
Snubber Brackets is being submitted pursuant to the requirements of 10 CFR 50.55(e).
This is a final report.
It is anticipated that no additional reports will be submitted.
DUQUESNE LIGHT COMPANY By M. Careye' vice President SOH/jdw-Attachment cc: Mr. P. Tam, Project Manager (w/a)
Mr. J. M. Taylor, Director (3) (w/a)
Mr. W. Troskoski, Sr. Resident Inspector (w/a)
M r. L. J. Prividy, NRC Resident Inspector (w/a)
INP0 Records Center (w/a)
NRC Document Control Desk (w/a) 8604030011 960319 PDR-ADOCK 05000412 S
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p 4'9 DUQUESNE LIGHT COMP'ANY BEAVER VALLEY POWER STATION - UNIT NO. 2 SIGNIFICANT DEFICIENCY REPORT 86-03 INCORRECT MATERIAL IN PAUL-MUNR0E PIPE SNUBBER END BRACKETS 1.
SUMMARY
Paul-Monroe, Inc. has identified a potential problem with snubber end brackets supplied for use on Beaver Valley - Unit No. 2.. The vendor indicated that incorrect material was used in the manufacturing of pipe snubber end brackets for use on Beaver Valley - Unit No. 2 (BVPS-2).
2.
IMMEDIATE ACTION TAKEN Ten pipe snubber end brackets were identified to have been shipped to BVPS-2 with the incorrect material.
A survey was undertaken to determine if' any brackets fabricated from the incorrect material had been installed. It was found that three were installed in Category I applications and.one in Category II application.
Mr.
R.
J. Wallauer, Acting Senior Compliance Engineer, notified Mr.
Dave Johnson, NRC Region I Office, on February 14, 1986 that OLC considered this issue to be a potentially reportable significant deficiency in accordance with 10 CFR 50.55(e).
3.
DESCRIPTION OF DEFICIENCY Under Purchase Order 2BV-599950, Paul Munroe, Inc. supplied hydraulic snubber brackets fabricated from ASTM A515 Gr. 70 material rather than ASTM A514 Gr. E, F, or P required by design specifications.
4.
ANALYSIS OF SAFETY IMPLICATIONS The question of the potential impact on the safety of plant operations was evaluated by comparing the actual design loads with derated loads provided by the vendor for the end brackets.
The three end brackets which were installed in Category I applications, and the one in Category II application could have sustained the design loads without failure.
However, a similar evaluation of all possible applications where the deficient end brackets could have been installed revealed at least one instance where the bracket could have failed.
This potential application was a snubber for a main steam line in containment and thus would have impacted the safety of plant operations.
5.
CORRECTIVE ACTION All of the uninstalled pipe snubber end brackets with incorrect material have been returned to the vendor.
The brackets which were installed will be removed from the plant and replaced with brackets f abricated from the materials specified in the design specification.
~6.
ADDITIONAL REPORTS This is a final report. No additional reports are expected.
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