ML20032A800
| ML20032A800 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 10/19/1981 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20032A801 | List: |
| References | |
| 14315, NUDOCS 8111020420 | |
| Download: ML20032A800 (3) | |
Text
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Consumers power James W Cook Vice President - Projects, Engineering and Construction General offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 780 0453 October 19, 1981 A
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Mr Harold R Denton, Director
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NRC AUDIT OF SEISMIC AND STRUCTURAL DESIGN CALCULATIONS FILE 0460.2, B3.0 SERIAL 14315
REFERENCES:
(1) ASCHWENCER LETTER TO JWCOOK/LHCURTIS, DATED JULY 7, 1980 (2) JWC00K LETTER TO RLTEDESCO, SERIAL 10109, DATED NOVEMBER 26, 1980 (3) DSHOOD NOTICE OF STRUCTURAL DESIGN AUDIT FOR MIDLAND, DATED MARCH 16,1981 ENCLOSURES:
(1) TEN-VOLUME SET "NRC STRUCTURAL TECHNICAL AUDIT" (2) FRRATA SHEETS FOR VOLUMES 2 AND 3 0F THE NRC AUDIT TEAM'S TEN-VOLUME SETS (3) FINAL REPORT ON NRC STRUCTURAL AUDIT OPEN ITEMS (4) DRAWINGS FOR THE DIESEL GENERATOR BUILDING Iri the NRC's July 7, 1980 correspondence, Reference 1, we were advised of the Staff's intention to perform a seismic and structural design analysis audit of major safety-related structures as part of their review of the Midland application for operating licenses. The audit was subsequently held during the week of April 20-24, 1981 in Bechtel's Ann Arbor offices.
In preparation for this audit, comprehensive written responses were prepared addressing the Staff's guideline questions forwarded by Reference 1.
These guideline questions and our written respenses were arranged into several bound ten-volume sets which were used by the NRC's audit team during the audit. At the conclusion of the audit five (5) ten-volume sets of the Midland structural audit questions and responses were presented tc, members of the NRC's review team to take with them.
As requested we are forwarding five (5) additional ten-volume sets to serve as the NRC's record copies. These complete sets (Enclosure 1) already contain, the errata sheets of Enclosure 2 and the additional revisions contained in/.
For those NRC audit team members who were provided with bound volume sets, we are forwarding copies of the errata sheets (Enclosure 2) which should be inserted into Volumes 2 and 3 of those 10-volume sets already in their possession. The errata sheets of Enclosure 2 have been reproduced on blue pages, except for the FSAR figures, to identify them as revisions.
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2 We are also forwarding five copiec of Enclosure 3 which is the final report on the structural audit open items.
This enclosure contains tie listing of open items from the audit and identifies the actions being taken on these NRC concerns.
Separate copies of Enclosure 3 are being forwarded directly to NRC audit team members because additional revisians to the bound ten-volume sets are contained in this final report.
During a discussior with the NRC Staff and its consultant, the Naval Surface Weapons fenter, held on May 28, 1981, the NRC requested drawings of the diesel generator building to allow preparation of an independent mathematical model of the structure for dynamic analysis.
By copy of this correspondence to the Naval Surface Weapons Center, we are.orwarding two additional sets of the drawings and information identified in Enclosure 4. One set of Enclosure 4 drawings were previously forwarded directly to the Naval Surrace Weapons Center on July 17, 1981.
Included for use are the Blueprints C-1001 through C-1009 and A-350 through A-352 which detail the structural features of the diesel generator building, Also included are two sketches showing the mathematical mcdel and locations and weights of major pieces of equipment in this structure.
We believe this completes the outstaading items from tae NRC structural design audit. The ten-volume audit sets of Enclosure 1 are now in their final form and no further revisions will be made to this document. The resolution of any remaining more long-term issues which may relate to the NRC structural audit will be document 2d by FSAR revisions or in separate correspondence to the NRC.
JWC/RLT/dsb CC RJCook, Midland Resident Inspector, w/o DFJudd, B&W, w/o GHarstead, Harstead Engg Assoc, w/2, 3 PCHuang, Naval Surface Weapons Center, w/2, 3,4 DSHood, NRC, w/2, 3 JDKane, MRC, w/o FRinaldi, NRC/SEB, w/2,3 HSingh, Army Corps of Engineers, w/2, 3 oc1081-0457a100
ENCIDSURE h t
i DIESEL GENERATOR EUILDING DRAWINGS 4
4 C-1001 (Qi Revision 11 C-1002 (Q) Revision 13 C-1003 (Q) Revision 9 C-100h (Q) Revision 9 C-1005 (Q) Revision 4 C-1006 (Q) Revision 3 C-1007 (Q) Revision 6 l
C-1008 (Q) Revision 1C C-1009 (Q) Revision 8 A-350 (Q) Revision 1 A-351 (Q) Revision 1 A-352 (Q) Revision 9 4
DG Mathematical Model Marked-up FSAR Figure 3.8-55, Revision 18 1
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