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NUCLEAR REGULATORY COMMISSION
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UNITED STATES gy%,
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'y g.....g July 16, 1981 A. B. Davis, Deputy Director MDiORANDUM FOR:
. neishman, Acting Director, Division of Resident i
THRO :
and Project Inspection G. Fiore111, Chief, Projects Branch 2, DRPI FROM:
REVIEW OF ZIMMER INSPECTION HISTORY
SUBJECT:
The following comments which reflect my personal judgments are offered in respo f Problems Identified, to J. G. Keppler's memorandum of May 6, 1981, " Evaluation o Zimmer Investigation".
General ld Final conclusions regarding the effectiveness of our inspection program shou d
be reserved until the licensee has completed his reviews of hardwa we have assessed his findings.
both.
whether the issues are record-related or hardware-related, or did not Structural work was inspected using the original inspection modules whichl d call for inspection of finished welds (observation of work cal e Sample size associated with observation of inprocess contr inspection).
welding (outside containment) was 18 welds.
size compared to the thousands of welds made.
The New modules which came out in 1979 required inspection of completed _ we sample size was increased somewhat to 36.
This work may be subject Inspections were conducted while work was in process.
ld acceptance criterion.
to change for various design and engineering reasons as wou ltd.
These changes would not be ir.spected since modules would have been comp e Electrical d
with Our program is built around verifying that installations are in accor anceChall his installation.
specifications and design requirements. cable tray loading, led to the un h
rogram While challenging of design bases has been done to a greater extent t an p d
d for increased requirements call for, it is an area which should be consi ere(This has attention in the future.
(control of engineering changes, Inspection of the design construction interfacedocument contro l
8207300148 820609 PDR FOIA DEVINE82-206 PDR
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- July 16, 1981 A. B. Davis This involves inspections at the AE offices, a responsibility assigned to More direct region participation to pursue these related activities Region IV.
as well as AE audits appears warranted.
Changes in Again, modules are completed before construction work is completed.
get observed by specifications or deviations from specifications might not inspectors.
_ Piping Radiography - The inspection program calls for review of radiography of field Ward's persistence to review the radiography of welds, not vendor welds.
vendor welds went beyond the program.
Small bore piping - Our program stresses large bore piping not small bore.
socket welds are not looked at as part of our program.
- Likewise, flexibility in AWS codes to allow designers to Codes - There is sufficientThis must be properly factored into our final evaluation change requirements.
and may in fact be a contributor to changes in work and inspection methods.
observed at the site.
Inspection Program should be noted that our program calls for a " Summary Inspection" so as to Areas include It provide a final assessment of construction hardware quality.This inspection was deferre piping, civil and electrical work. I feel confident this inspection would have investigation efforts at Zimmer.
While I produced the same type of findings made during the investigation.the inv l
l would credit it as the forcing function.
is giving more attention to and One area which may warrant additional effort dealing more directly with a licensee's inability to properly correct problems In the case of in a timely manner that were brought to attention by the NRC.
Zimmer, the licensee was informed directly that a license would not be issued This approach until the NRC was satisfied with the quality of construction work.
can result in the lingering of problems and their resolution until the operating license issuance time, a situation which may characterize the Zicmer situation.
l 1
h G. Fiore111, Chief
'^' Projects Branch 2, DRPI cc: R. C. Knop
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