ML19329E322
| ML19329E322 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 11/12/1974 |
| From: | Schwencer A US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8006120629 | |
| Download: ML19329E322 (4) | |
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Docket Nos. 50-329/330 I
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cons =er Power company THIS DOCUMENT CONTAINS.
M Attat Mr. S. H. Howell 6'
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.vice Presidene POOR QUAUTY PAGES l
212 West Michigan Avenue Jackson, MI 49201 Gentlemen:
We have reviewed Sections 2.2.8, 9.3 and 9.8 of Amendment 25 to your i
application for the Midland Plant, Units 1 and 2.
We have requested in the enclosure to this letter additional information needed to clarify snd amplify your previously submitted information applicable to Amennhnant 25.
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.c In sumary, our review r. annat be completed for the sections speci.iied
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above until you provide the additional information requested for staff I
review.
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Please contact us if you have any questions regarding the information 2-j requested.,
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, Sincerely..
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Directorate of Licensing 4-
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Enclosure:
Requests for Information m
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4 ces: Harold F. Reis. Esquire DISTRIBUTION:
Newman, Reis, Axelrad AEC PDR 1025 Connecticut Avenue, N.W.
LOCAL PDR Washington, D.C.
20036 Docket File (2) /
LWR 2-3 File Howard J. Vogel, Esquire V.A. Moore Enittle and Vogel F.Schroeder 814 Flour Rrchange Building R.Klecker A
310 Fourth Avenue South OGC Minneapolis, Minnesota -55415 Project Manager 1
R0 (3)
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Bonorable William H. Ward Licensing Assistant' Assistant Attorney General TR BCs Topeka, Kansas 66601 LWR 1 & 2 Branch Chiefs ACRS (16)
Irving Lir.e, Esquire A. Schwencer Reilly, Like and Schneider 200 West } kin Street Babylon, NY 11702 e
Myron M. Cherry, Esquire'
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Chicago,-IL 60611 James A. Kendall, Esquire l
135 N. Saginav Road'
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Midland, MI 48640 i
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p Requests for Information (Smendment 25)
Consumers Power Company Midland Plant, Units 1 and 2 Docket Nos. 50-329/330 2.2.8 Make-up Water Supply 1.
Figure 2-16 shows details of t.. river intake structure.
Q Discuss the provisions that have been made in the design of this structure to remove accumulated silt and sludge in the settling basins since excessive accumulation of silt would affect the operation of the cooling water system.
2.
Figure 2-16a shows details of the make-up water pump structure.
Provide the following additional information:
(a)
Demonstrate that failure of one pump will not jeopardize operation of the other two pumps due to internally generated missiles.
(b) What provisions have been made in the pump room operating floor penetrations (elev. 614 ft.) and equipment to floor interfaces to prevent flooding of the pump room when water levels reach the design basis probable maximum flood stillwater level.
9.3 Decay Heat Removal System 1.
Page 5 of the summary of Amendment 25 states
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the design of the borated water storage tanks has been changed to consist of two tanks, one per reactor unit.
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Revise the PSAR text accordingly and provide a revised Figure 9-4.
9.8 Auxiliary Feedwater System 1.
Section 9.8.2 states that the feedwater system for each unit consists of one full capacity steam turbine driven and one full capacity electric motor driven auxiliary feedwater pump and associated valves, piping and controls.
Provide the results of a failure mode and effects analysis which demonstrates the capability of the two 100% capacity auxiliary feedwatcr pumps to attain a safe plant shutdown under conditions stated in considering Mr. A. Giambusso's high energy line break criteria dated December 15, 1974, and a concurrent, single active failure of any active component in the auxiliary feedwater system including a hot short of valve operators during normal startup, shutdown or normal operation.
Provide a description of any modifications that may result from this analysis.
2.
Section 9.8.2 also states in the event of loss of water supply from the condensate storage tank, a manual back-up is provided from the service water system.
Clarify what is meant by " manual back-up".
Indicate this change on the 4.ppro-priate P&I Diagrams.
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