ML19290B821
| ML19290B821 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 10/16/1979 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7912140175 | |
| Download: ML19290B821 (6) | |
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Docket Nos. 50-329 and 50-330 APPLICANT: Consumers Power Ccmpany FACILITY:
Midland Plant, Units 1 & 2
SUBJECT:
SUMMARY
OF JULY 18, 1979 MEETING ON SOIL DEFICIENCIES AT THE MIDLAND PLANT SITE On July 18, 1979, the NRC staff met in Bethesda, Maryland with Consumers Power Company and the Bechtel Corporation to discuss deficiencies in the fill used at the site for Midland Plant, Units 1 & 2.
Also present were representatives of the ACRS staff. Meeting attendees are listed in.
In response to NRC requests, the applicant has documented in detail the presentations given during this meeting. The presentations are contained in S. H. Howell's letter to J. G. Keppler dated August 10, 1979.
In view of the August 10, 1979 letter, no summary of the presentations is contained herein. Rather, additional discussion consisting of comments and questions given during and following the presentations are summarized.
During the presentation regarding remedial work in progress or planned (item 3 of the presentations), the staff noted that underground piping from the barated water storage tanks and service water lines pass under railroad tracks, and that these and other piping are subject to loads due to construction cranes and other traffic. The staff requested the applicant to describe the design features and other measures which assure that such piping is not subjected to excessive loads. The applicant will respond at a later date.
The applicant noted that it is performing laboratory investigations of the stainless steel piping removed from the condensate storage tank.
This underground piping was found to be heavily corroded.
It was noted that the injection piping from BWST is of the same composition and is also unprotected from electro-chemical attack. The test-pits in the tank farm area which are being dug to investigate the effect of the air discharged from underground pneumatic lines was also described.
Results will be reported shcrtly.
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Consumers Power Company The staff noted that the response to its 10 CFR 50.54 requests for acceptance criteria for remedial actions (e.g., questions 4, 6, etc.) had not resulted in identification of criteria in advance of the remedial action. Rather the reply notes that the criteria will be determined during or after the remedial action. The staff stated that this approach by the applicant does not provide for timely staff feedback at the outset, but rather the staff must await results of the program to determine what acceptance criteria were used and if they are acceptable. Thus, the remedial action is being conducted entirely at the applicant's own risk.
The applicant's presentation of the permanent site dewatering system (presen-tation item 3.8) noted that the system is not designed to seismic Category I requirements, but that the monitoring aspects of the system are safety grade. The NRC staff noted that acceptance criteria for the dewatering system are given in the Standard Review Plan (Section 2.4.13, Revision 1) and requested that the applicant address Branch Technical Position HMB/GS81,
" Safety Related Permanent Dewatering Systems", Revision 1, attached thereto.
The applicant will respond in the near future. The quality assurance plan for implementing the dewatering system will also be provided in future reports.
Bechtel described the structural and seismic analytical investigations being performd or planned for the affected structures (item 4 of the presentations).
The st aff noted that further review of the acceleration (g) value used for site casign has been impacted by staff manpower restructuring for the TMI-2 investigations and that use of outside contractors for the Midland seismic review is presently being considered. The staff also noted that its present revieu indicates some areas of disagreement with the applicant's proposed loads ccmbinations and design criteria for SSE and differential settlement, and with the treatment of cracks in structural walls. The staff will further documnt these and other positions at a later date.
Bechtel reported (item 7 of the presentations) the results of its investi-gations into the cause of insufficient compaction of the plant area fill, and identified five causes considered to be the most probable. The applicant noted its agreement with the Bechtel findings. Bechtel noted that personnel were tot included as a most probable cause because its review of qualifications and eperience of both Bechtel and US Testing perscnnel had shown presence of sufficient education, experience, and training to carry out the tasks assigned.
The NRC staff noted that it disagrees with Bechtel's finding that personnel qualification was not a probable cause, and stated that further review of the basis for this Bechtel finding will be needed.
Staff comments regarding the QA/QC aspects (presentation item 3) were based upon the applicant's 10 CFR 50.54(f) responses to question 1 by letter of April 24, 1979:
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0 Consumers Power Company (1 ) The applicant's response in item B.1 of Appendix I (page I-3) states its conclusion that " Specifications C-210 and C-211 provide sufficient criteria by which to ensure that the fill is adequately placed to prevent excessive settlement." The staff noted its disagreement with this statement. T,he staff noted, for example, that its I&E investigations show that the specifications did not require qualification of equipment used to compact material, the lift thicknesses permitted were excessive for adequate compaction, the moisture control was unclear and the compactive effort to develop 95" of compaction was internally in conflict within Specification C-210.
(2) The applicant's response in item B.2 of Appendix I (page I-3) noted that letters, TWX's, telecons, and memoranda are often used to clarify the intent of the specifications, and that "it is possible" that in some situati(ns the clarification provided through such methods may have modi 'ied the specifica!. ion without formally changing the wording of t.se specifications. The staff comented that a more positive statement appears to be warranted based upon the findings of I&E. Numerous examples where telecons and memoranda were used to change the requ~,ents of the speci-fications without revising the controlled av.ument itself was cited in I&E Inspection Report No. 50-329/78-20 and 50-330/78-20.
I&E found that not only did these memoranda change the require-ments of the specifications, but in some instances, conflicted with previous engineering directives.
(3) The staff noted that its review of QA aspects was continuing and that further requests for information would be issued.
At the conclusion of the presentations, the NRC staff noted that the information presented was significant to the present review, and requested that the applicant document and submit its presentations, including copies of the viewgraph slides used.
W l-/x.. h
-,a Darl Hood, Project Manager Light Water Reactors Branch No. 4 Division of Project Management
Enclosure:
As stated cc:
See next page 1574 196
r' MEETING
SUMMARY
DISTRIBUTION CCT 151979 Docket File NRC PDR Local POR TIC NRR Reading LWR #4 File H. Denton E. Case H. Berkow W. Russell D. Ross D. Vassallo S. Varga J. Stolz R. Baer
- 0. Parr L. Rubenstein C. Heltemes L. Crocker B. Xirschner F. Williams R. Mattson R. DeYoung Project Manager D. Hood Attorney, ELD Licensing Assistant M. Service IE (3)
ACRS (16)
R. Denise NRC
Participants:
D. Gillen R. Lipinski J. Gilray F. Schauer L. Heller R. Hoefling D. W. Hayes G. Gallagher J. B. Henderson D. Zukor P. Tam 1574 197
Consumers Powr Company' ccs:
Michael I. Miller, Esq.
Mr. S. H. Howell Isham, Lincoln & Eeale Vice President Suite 4200 Consumers Pcwer Ccmpany One First National P1aza 212 West Michigan Avenue Chicago, Illinois 60603 Jackson, Michigan 49201 Judd L. Bacen, Esq.
Constrers Power Company 212 West Michigan Avenue Jack ~ son, Michigan 49201 Mr. Paul A. Perry Secretary Consumers Powr Cor.gany 4
212 W. Michigan Avenue s-.
Jackson, Michigan 49201 Myron M. Cherry, Esq.
.4 One IBM Plaza
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Chicago, Illinois 60611
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Mary Sinclair 5711 Stcmerset Crive Midland, Michigan 48640 Q3
-4 Frank J. Kelley, Esq.
,3 Attorney General wm State of Michigan Environmental O
Protection Division
.,9,
720 Law Buildfng
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Lansing, Michigan 48913 4R.
Y Fr. Wendell Marshall
~ MA Route 10 7'
Midiand, Michigan 48640 J4 >
Grant J. Merritt, Esq.
yw Thompson, Niel sen, K1 averkamp & James
- ~
4444 IDS Center Y'
80 South Eighth Street
' ASE Minneapolis, Minnesota 55402 Mr. Don van Farow, Chief Civision of Radiological Fealth Ceoartment of Public Health 3
O. Eox 33035
.ansing, Micnigan 15909 1574 198
s ENCLOSURE 1 ATTENDEES July 18, 1979 Consumers Power Comoany Bechtel*
G. S. Keeley T. E. Johnson (BPC)
D. E. Horn P. A. Martinez (BPC)
T. Thiruveneadam K. Wiedner (BPC)
T. C. Cooke D. Riat (AA)
W. R. Ferris (SF)
H. Wahl (AA)
NRC:NRR A. B. Arnold (SF)
B. Dhar (AA)
D. S. Hood F. J. Hsiu (AA)
D. M. Gillen S. S. Afifi ( AA)
R. E. Lipinski G. Richardson (BPC)
J. Gilray A. J. Boos (BPC)
F. Schauer J. R. Davie (G)
L. Heller L. S. Rubenstein Bechtel Consultants NRC:0 ELD R. B. Peck R. Loughney R. Hoefling C. H. Gould NRC:IE D. W. Hayes G. Gallagher J. B. Henderson ACRS
1574 I99 G=
Gaithersburg, Md.
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