ML20082B946
| ML20082B946 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 11/04/1983 |
| From: | Quamme D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Harrison J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| CSC-6978, NUDOCS 8311210380 | |
| Download: ML20082B946 (1) | |
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.SD 'Sb dB43D November 4, 1983 Mr J J Harrison Midland Project Section U S Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND ENERGY CENTER CWO 7020 SERVICE WATER PUMP STRUCTURE LOAD TRANSFER File: 0485.16.2 UFI:
42*05*22*04 Serial: CSC-6978 The following item is not addressed in the Midland Safety Evaluation Report (including Supplements 1 and 2) concerning the service water pump structure load transfer (Section 3.8.3.2).
Before excavating pier pits 7 and 7A, piers 1 through 6 and 1A through 6A will be loaded to 125 percent of the Stage I loads (unless otherwise directed by the resident structural engineer). This will be done to maintain structure elevation during the excavation of pier pits 7 and 7A.
These loads will be decreased as the jacking of piers 7 and 7A progresses so that when piers 7 and 7A are jacked above the Stage I loads, the temporary increase will be eliminated and piers 1 through 6 and 1A through 6A will again be at 1007. of the Stage I loads. This will not adversely affect the structure because it simply redistributes the loads in the vicinity of the excavation to the other piers until piers 7 and 7A can be jacked. Other conditions more critical than this have already been analyzed.
If you have any concerns or comments regarding this subject, pleasa contact this office.
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