ML20085K568
| ML20085K568 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 10/14/1983 |
| From: | Erhardt R CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 25867, NUDOCS 8310210027 | |
| Download: ML20085K568 (5) | |
Text
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Consumem Power Company General offices: 1945 W..t Parnall Road, Jackson, MI 49201 e (517) 788-0550 y
October 14, 1983 4
Harold R Denton 4
Office of Nuclear Reactor Regulation U S Nuclear Regulatory Commission Washington, DC 20555 MIDLAND ENERGY CENTER MIDLANL DOCKET NOS 50-329, 50-330 ADDITIONAL INFORMATION REQUESTED BY NRC STAFF AT THE TECHNICAL AUDIT OF THE DIESEL GENERATOR BUILDING FILE: B3.0.3 SERIAL: 25867 This letter transmits to the NRC Staff the information requested at the September 12, 1983 Technical Audit of the Diesel Generator Building (DGB) in Ann Arbor, Michigan. The information provides a comparison of robar stresses resulting from two analyses in which the forty-year estimated settlements (Settlement Case 2B) were performed on a finite-element model of the DGB.
The model and the referenced settlement case were previously discussed by Mr Karl Wiedner at the Atomic Safety and Licensing Board (ASLB) hearing held on December 8 & 9, 1982.
Table 1 gives the stresses for settlements imposed at 10 boundary nodes around the DGB foundation; specifically, 5 nodes on the south wall, and 5 nodes on the north wall. These nodes are located at the intersection of cross walls with north and south walls. This analysis was performed for information 2
purposes only and was carried out during April of 1982.
Table 2 gives stresses for the same settlement case as above, however, this time, settlement values were imposed at 66 boundary nodes around the DGB foundation. The settlement values were obtained by fitting smooth fourth-order polynomial curves through the same settlement values for the 10 node pointe on the north and south walls stated above. Likewise, this analysis was performed for information purposes only and at the suggestion of the NRC Staff during the aforementioned audit.
8310210027 831014 8 }
PDR ADOCK 05000329 A
PDR OC1083-0055A-MP04
2 Tabulated rebar stresses for the majority of the elements for both cases are considerably in excess of the allowable value (54 ksi). For the elements with maximum stress values in the the same category the rebar stress values obtained from the second analysis (Table II) are consistently higher than those obtained from the first analysis (Table I).
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CC RJCook, Midland Resident Inspector JGKeppler, Administrator, Region III DHood, NRC FRinaldi, NRC PTKuo, NRC GLear, NRC CHarsted, Consultant JMatra, NSWC MReich, BNL CMiller, BNL CConstancino, BNL JKane, NRC RLandsman, Region III a
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CONSUMERS POWER COMPANY Midland Units 1 and 2 Docket No 50-329, 50-330 Letter Serial 25867 Dated October 14, 1983 At the request of the Commission and pursuant to the Atomic Energy Act of 1954, and the Energy Reorganization Act of 1974, as amended and the Commission's Rules and Regulations thereunder, Consumers Power Company submits information requested by the NRC during the DGB audit held on September 12, 1983.
CONSUMERS POWER COMPANY By g
R J Erhardt ExecQtive Manager - Midland Project Swornandsubscribedbeforemethis/Y day of h 6-O Lut 0Johntav1) i Notary Public My Commission Expires i '
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