ML19329F043
| ML19329F043 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 04/18/1974 |
| From: | Mackay S US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Esienhut D, Hendrie J, Varga S US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| NUDOCS 8006190836 | |
| Download: ML19329F043 (3) | |
Text
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APR 181974 50-3gAND50-330
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P00R QUALITY PAGES APPLICANT : CONSUMERS POWER COMPANY g
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- MIDLAND UNITS 1 AND 2
SUMMARY
OF MErfING REGARDING FOST LOSS-OF-COOLANT ACCIDENT PROTECTION (PLOCAP) AND CONTAINMENT LEAKAGE TESTING On Wednesday, April 3 1974, members of the Regulatory staff met in Bethesda, Maryland with representatives of Consumers Power Company C
(CPC), Babcock and Wilcox (B&W), and Bechtel Associates Professional Corporation (BAPC). CPC had requested this meeting to obtain guidance from the Regulatery staff regarding contemplated changes to provisions l
for PLOCAP and plans for the use of the veld channel system during normal operation and for containment leakaEe testing. The results of discussions are sumari::cd below.
1.
PLOCAP CPC has been considering amending its construction permit application to eliminate provisions for PLOCAP in order to use the reserved space for other purposes. The basis for this consideration includes (1) 9 a
continued confidence in reactor vessel integrity as reflected in the
'l ACRS report on the integrity of reactor vessels, (2) improvements in the capability of monitoring reactor vessel integrity including:
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increased accessibility to the inside and outside surfaces; automatic UT inspection capability; promising developments in acoustic signature monitoring (requiring no disturbance of the operating loop, other.than changes in reactor coolant _sys.tes_ pressure _within.the normal operating range ; and (3) the elimination of the undesirable consequences of (iitadi)e,riinE] operation of a PL0di' system.
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e of the PLOCAP consnitment would represent a significant change and might ' MW79 require a supplement to our.CP evaluation. CPC was advised to retain.
N [I provisions for PLOCAP.
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- The applicant then discussE 'the conceptual design of PLOCAP and some',.
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g; desirable changes such as location cf water storage tanks outside of the
-*1 containment building rather than inside. The stuff's coments were not counteractive.
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4 yylN y-It is expected that the applicant will formally submit proposed changes to the arrangessent of equipment for PLOCAP and define the actual con-struction that will be undertaken to provide for a PLOCAP system.
2.
Containment Systern The Midland containment building will have leak-tite channels covering all containment liner plate welds. CPC proposed alternate methods of
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utilising this channel system:
(1) pressurizing the channels above the postulated accident pressure at all times with clean air and taking credit for the fact that contaminants in the containment building atmosphere could not leak out through imperfections in the liner plate.
weld or (2) keeping the unpressurized channels closed so that the channels would present an additional barrier to leakage through imperfections in the liner plate welds. 'Both systems have merit and the best choico was not apparent. CPC vill formally propose one of the systems for use at Midland.
An attendance list is enclosed.
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en S. D. MacKay, Project Manager Li;,ht'. Water Reactors Branch 2-3 Directorate of Licensing
Enclosure:
List of Attendees DISTRIBUTION:
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4 MEETING HELD APRIL 3, 1974 UITH CO:iSCIERS F0WER COMPANY MIDLAND UNITS 1 AND 2 LIST OF ATTENDEES Atomic Energy Co::: mission S. D. MacKay G. E. Cummings G. C. Lainas V. Stello E. H. Brook A. Schwencer E. G. Case R. Maccary I
Censumers Power Company
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D. J. Birkle W. E. Kessler M. P. Hanson Bechtel P. Thompson T. W. Vanvick J. L. Hurley Babcock & Wilcox l
G. W. Delaney A. L. Lowe, Jr.
A. H. Lazar 1
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