ML20009B529
| ML20009B529 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 07/13/1981 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| NUDOCS 8107160228 | |
| Download: ML20009B529 (1) | |
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JUL1 3 ngs Docket No. 50-329 Docket No. 50-33^
Consumers Power Company ATTN:
Mr. James W. Cock Vice President Midland Project 1945 West Parnall Road Jackson, MI 49201 Gentlemen:
This refers to your letter dated June 26, 1981, regarding the borated water storage tank surcharge program. Regarding your stated plan 4 for surcharging the valve pits of the borated water storage tank, the NRR staff has indicated that they wish to review the proposed procedures which were attached to your letter. Such review is expected to be accomplished by July 15, 1981.
This letter is to confirm our telephone discussion on July 2, 1981, in which you agreed that the surcharging would not begin on July 6, 1981, as indicated, but that you would withhold this action until after conferring with the NRR staff on July 15.
The NRC's interest in this matter is tied to the fact that we ceasider the borated water storage tank surcharge program to be related to the soils 4
issue, contrary to the position expressed in your June 26, 1981, letter.
Please let me know if you have further questions on this catter.
Sincerely, fh.,
MSlhl James G. Kepp.yr d[7 j
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Director cc w/1tr dtd 6/26/81:
DMB/ Document Control Desk (RIDS)
Resident Inspector, RIII Ronald Callen, Michigan Public Service Commission g/
Myron M. Cherry H. R. Denton, NRR S
/f C. Bechhoefer ASLB Panel R. S. Decker, ASLR Panel F. P. Cowan, ASLB Panel M.
M.- Cherry, Esq.
M. Sinclair RI R11 RIII RII RIIJ 1
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General offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 788 0453 GiUl(Nllnems 040 BF Ju'ne 26, 1981
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Mr J G Xeppler, Regional Director Office of Inspection and Enforcement US Nuclear Regulatory Conunission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND PROJECT DOCKET NOS 50-329 & 50-330 BOARATED WATER STORAGE TANK (BWST) - SURCHARGE PROGRAM FILE:
0485.16, 0.4.9.49 UFI:
73*10*01, 71*01 UFI: 01100(E), 02362 (S), 00234(S) SERIAL:
12799
REFERENCES:
J W COOK LETTERS TO J G KEPPLER: SAM 1. SUBJECT (1) SERIAL 11201; DATED FEBRU*RY 20, 1981 (2) SERIAL 11528; DATED APRIL 3, 1981 (3) SERIAL 12015; DATED JUNE 12, 1981 ENCLOSURES:
(1) SURCHARGING AND MONITORING " FIELD OPERATIONS
SUMMARY
(2) BECHTEL DRAWING NO C-1148 (Q) - Rev 2 (3) BECHTEL DRAWING NO C-1152 (Q) - Rev 1 (4) DESIGN CHANGE NOTICE NO. 1 FOR DRAWING NO C-1152 (Q)
This letter, as were the referenced letters, is an interim 50.55(e) report concerning the existence of cracks in the borated water storage tank foundation.
In accordance with commitments made with the NRR staff in meetings on May 5, 6, 7, 1981, we are forwarding the four enclosed document' which identify the design and procedural controls established for the monituring program related to the borated water storage tank valve pit surcharge.
It should be noted that specific direction is provided in these documents relative to the following:
(1) settlement monitoring program; (2) strain gage installation and operation (provides input relative to structural distress); (3) visual crack mapping (provides input relative to structural distress); and (4) cutting of piping prior to application of surcharge.
We call your attention to the four 18-inch process lines identified on i
Enclosures 2 and 3.
These four lines along with the four smaller diameter fill and drain lines were cut within 2-feet and 4-feet, respectively, from the outside face of the BWST valve pit valls. The small portions of piping extending beyond the outer v31ve pit walls will settle together with valve pit oc0681-0326a100 gg) k
1 and the adjacent soil-mass under the action of the surcharge with an insignificant change in stresses.
The settlement markers BW IA, BW 2, BW 8A, and BW 9 shown on Enclosure 2 have been established to monitor the other buried portions of the 18-inch process lines. Settlement readings will be taken from these points prior to and after the surcharge.
Pipe stress calculations were done an the process lines based on a predicted settlement of 0.48 inch and all stresses were within the elastic limit of the piping material.
If the final settlement readings for these points exceed the expected settlement of 0.48 inch, additional piping stress calculations will be performed.
In our three-day meeting with the NRR Staff and Region III on May 5-7, 1981 we presented the details of our schedule for the BWST surcharge and remedial actions. As we indicated in the May meeting maintaining the schedule for the BWST Surcharge and remedial actions is very critical to our preoperations testing program.
We believe that the enclosed information combined with our discussions with the NRR Staff on May 5-7 and June 24, 1981 responds to NRR concerns. Further, as stated in our May 5-7, 1981 meeting we do not feel that this BWST problem is soils related. For these reasons and due to the importance of maintaining our scLedule, we will begin surcharging the valve pits on July 6, 1981.
If you have any additional concerns please inform us as soon a possible so that we can incorporate them into our surcharge program. This surcharge program does not foreclose any possible remedial fixes.
Another ra.;t, either interim or final, will be sent on or before September 15, 1981.
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l CC Director, Office of Inspection & Enforcement Att Mr Victor Stello, USNRC (15)
Director, Office of Management Information & Program Control, USNRC (1)
RJCook, USNRC Resident inspector Midland Nuclear Plant (1)
HRDenton, NRR (4) w/a JDKane, NRR (1)
PLeech, NRR (1)
CBechhoefer, ASLB Panel w/o RSDecker, ASLB Panel w/o FPCowan, ASLB Panel w/o MMCherry, Esq w/o MSinclair w/o oc0681-0326a100 e
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