ML20198D437

Partially Withheld Assessment of Allegation AQ-130 to Allegation Category Qa/Qc 5A, Repair,Rework & Maint Re Different Repair Traveler Valve Disk Numbers from Code Data Rept Numbers

ML20198D437
Person / Time
Site:	Comanche Peak
Issue date:	06/07/1985
From:	Livermore H, Watson V NRC, NRC - COMANCHE PEAK PROJECT (TECHNICAL REVIEW TEAM)
To:
Shared Package
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References
FOIA-85-59, FOIA-85-89 NUDOCS 8605230272
Download: ML20198D437 (2)

Text

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1. Allegation Category: QA/QC 5A Repair, Rework, and Maintenance

2. Allegation Number: AQ-130

3. Characterization: It is alleged that valve disc numbers on repair travelers are different than those on the code data report.

4. Assessmer.t of Safety Significance: In assessing this allegation, the NRC Technical Review Team (TRT) reviewed procedures CP-CPM-9.18, Revision 0, and QI-QAP-11.1.39A, Revision 3, concerning valve disassembly / reassembly, and verified that the program for control of valve repairs was adequate.

The TRT reviewed the repair travelers associated with 5 out of the 53 valves that had been repaired between July and October 1983, the time period of the allegation. Only five travelers were reviewed because of time limitations.

The repair travelers required the QC inspector to record either the disc serial number or heat number on the traveler. On one traveler the QC in-spector recorded the assembly number for the disc and stud assembly in-stead of the serial or heat number. In this instance, the number recorded differed from the material heat number recorded on the valve code data -

report, giving rise to the error alleged. However, the repair traveler providing the detailed instructions for repair of the valves required the parts to be packaged and tagged after disassembly. Another step on the traveler required the inspector to verify that the parts removed from the valve were reinstalled after repairs were made. Reinsta11ation was veri-fied and signed off as acceptable by construction and QA/QC on all five of the travelers reviewed. These additional checks and balances in the mechan-l ical equipment valve (MEV) traveler system help to maintain traceability, even if a ' recording error occurs in the inprocess paperwork.

The TRT also reviewed the drawing verifying that the traveler contained the

, assembly number recorded on the drawing, thereby confirming the material traceability for the valve disc in question. Although the assembly number was recorded on the traveler, the assembly number could also be used to maintain traceability. Based on the information reviewed, this recording error (disc and stud assembly number vs. serial or heat number) appeared to be an isolated case.

5. Conclusion and Staff positions: The allegation that valve disc numbers on travelers differed from those on data reports was substantiated. However, j the TRT staff finds that this mismatch was only a recording error and has confirmed that the material removed from the valves was identical to the material reinstalled. Hence, the repair traveler system assures parts traceability.

7. Attachments: None.

Reference Documents:

1. Traveler for valve S/N12048.

~

BA055 off2 8505i2 t:PDR FOIA 0-141 iGARDE85-89_ .PDR .

~

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2. NCR M-6061.

3. CMTR for disc heat IK25.

4. CMTR for disc heat 1H86.

5. Front page of code data report and part of drawing which identifies the assembly as number 72089.

15 . DCA 15842.

7. Borg-Warner drawing 73754A.

8. Mechanical Equipment Valve (MEV) receiving log from July, August, September, and most of October 1983.

9. Deposition by A-54, July 28, 1984.

-10. Travelers for valves S/N12049,12050,12051, and 12052.

8. This statement prepared by: Mom (A). N k.~ Watson, TRT w 6//,/kS~

Dat'e /

Technical Reviewer Reviewed by: 't1444At H. Livermore,

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Cate Group Leader  :

Approved by:

V. Noonan, Date Project Director 0-142