ML19317F810
| ML19317F810 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 04/20/1971 |
| From: | Spencer G US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Henderson J US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML19317F811 | List: |
| References | |
| 12261, NUDOCS 8002210568 | |
| Download: ML19317F810 (2) | |
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h UNITED STATES
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' ATOMIC ENERGY COMMISSION
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oivislON Ofr COMPLIANCE J
RsGION V i
s111 BANCROFT WAY BsRetsLky, CALIFORNIA 94704 ru m.m.s. est-sian Eisf. SSt April 20, 1971 J. B..Henderson, Chief Reactor Construction Branch i
Division of Compliance, Headquarters SACRAMENTO MUNICIPAL UTILITY DISTRICT (RANCHO SECO)
DOCKET No. 50-312 The attached report by our field inspectors of an unannounced visit to the s'ubject construction site on March 22-25, 1971 is forwarded for information.
No significant safety problems or deficiencies were identified during the i
inspection.
Items reviewed included Nonconforming Reports not previously reviewed, the QC program for "other Class I Components" (PI-3800 and PI-4900), the QC program for independent verification that electrical and instrument cables meet design criteria, and r2 cords of-essential variables during welding operations. The proposed inspection of the construction of a site-fabricated pressure vessel was not-possible since the contractor for Class I vessels will not be on-site until July, 1971.
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The need.to activate the Management Safety Review Conunittee was again emphasized to SMUD management.
'Mr. Connelly agreed that it would be prudent j
to activate the Conunittee and, as a start, review and approve the proposed technical specifications..
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- Information obtained during the inspection indicates that SWEPCO TUBE CORPORATION has established procedures for the " rapid" air cooling of stain-less steel pipe, iThe. pipe is required to be " black" within three minutes.
-SWEPCO's statement of practice and a photomicrograph were subsequently obtained ifor review from SMUD. This information was discussed with Messrs. W. J.
Collins and R.'W. Reinmuth, CO:HQ on April 13, 1971.,Mr. Collins stated
.that the etch used will show general structure arrangement but is not considered r
-appropriate to show carbide precipitation'in the grain-boundaries. Striecher's-
~ Reagent-is recommended for this. application and should be applied electrolyti-feally. Further, the magnification shcald probably be 750X or 1000X rather L
than 100X. lMr. Reinmuth stated.that he felt the practice of air quenching l
was being used.by the industry. However, in view of our information, he thelieves that a vendor inspection would be appropriate for the purpose of.
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2-reviewing quenching practices and subsequent checks to ensure that the stainless steel pipe had not become sensitized. We have informed SNUD that we still-consider this to be an open item.
M. Jackson stated that he would r
discuss our concerns regarding the testing procedure with Bechtel's antallurgists_and would act accordingly.
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G. S. Spencer Senior Reactor Inspector j
Enclosure:
CO Rpt. No. 50-312/71-2 by R. T. Dodds cc w/ enc 1:
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l E. G. Case, DRS. (3)
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P. A. Morris, DRL.
R. S. Boyd, DRL (2)
R. C. DeYoung, DRL (2)
D. J. Skovholt,1DRL (3)
P. W. Howe, DRL (2)
- -A.- Giambusso, CO L. Kornblith, Jr., CO-R. H. Engelken, CO 1
Regional Directors, CO REG Files i
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