ML20138J174
| ML20138J174 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 08/13/1985 |
| From: | Sells D Office of Nuclear Reactor Regulation |
| To: | Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| OL-I-CCANP-142, NUDOCS 8510290278 | |
| Download: ML20138J174 (3) | |
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OCT 2 81981 NC
'85 00T 17 A9:33 MEMORANDUM FOR:
D. G. Eisenhut, Director, Division of Licensing, NRR f lg GFfg[ a: 3Lt THRU:
R. L. Tedesco, Assistant Director for Licensing]CDU Tmu a m,.m -
. J. Miraglia, Chief, Licensing Branch 4kh -3, DL D HCH FROM:
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SUBJECT:
SUMMARY
OF QUADREX F.EPORT - SOUTH TEXAS PROJECT The following tabulation is a very brief sumary of the Quadrex Report that deals with the engineering design status of the South Texas Project.
The study conducted by the Quadrex Corporation was not an in-depth analysis of Brown and Root's design effort to date.
The study T5'oked at eight specific o
areas:
1.
Civil / Structural 2.
Coaputer Codes 3.
Electrical / Instrumentation and Control 4.
HVAC 5.
Mechanical 6.
Nuclear / Mechanical Analysis 7.
Piping and Support 8.
Radiological Control Within each area Quadrex placed each concern that was identified into one of the following categories:
o most serious - impacts licensing e serious - impacts reliability e noteworthy - contributes to project schedule and/or cost increases potential problem - may or may not be a problem, further investigation e
required.
e other-minor or not amenable to corrective action.
The attached table provides the number of concerns in each category for each area reviewed.
NUCLEAR RECULATORT COMMlltion
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RECEIVED 4,ilat s p.t RtJECTED ___
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.- In addition the Quadrex Report identified four problem areas with regard to Inservice-Inspection and cited 21 specific areas with regard to maintenance access engineering.
There were a total of 17 findings that were classified by Quadrex as generic.
Pending the results of the Bechtel in-depth analysis it would be pre-mature to place great weight on the following laundry list excerpted from Section 3 of Volume 1 of the Quadrex Report:
1.
No indication of an effective systems integration and overview function.
2.
Input data not consistently reviewed with calculations containing errors verified as correct. Vendor submitted reports not consis-tent.
3.
Thorough and consistent treatment of various plant operating modes and environmental conditions is not evident.
4.
Distinction between Safety-Related and Non-Safety Related equipment and calculations is questionable.
5.
No written guidelines exist for the conduct of failure mode and effects analysis.
6.
No documented evidence that FSAR commitments are being met.
7.
Little evidence of a well-thought-out and consistent basis for design.,
8.
Specific reliability requirements have not been established.
9.
Nuclear-related analysis questionable.
- 10. Use of preliminary data permitted up to the point of fuel loading.
- 11. Inadequate consideration of plant operation criteria.
- 12. Ineffective use of natural plant symetry.
- 13. Incomplete specification of valve closure rates.
- 14. Inadequate analysis concerning access for maintenance and in-service-inspection.
- 15. Test provisions do not appear to have been systematically considered and implemented.
- 16. Local temperatures during maintenance may not have been considered adequately.
17. Use of abnormally low seismic valves for valve and pump end loads.
Volume I of the Report provides the results of the study and Volumes II and III provides the back-up information that was obtained in the brief time (3 months) that was devoted to gathering information by Quadrex.
Donald E. Sells, Project Manager Licensing Branch No. 3 Division of Licensing l
cc: See next page.
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