ML20126L969
| ML20126L969 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/18/1981 |
| From: | Kane J NRC |
| To: | |
| Shared Package | |
| ML20126L966 | List: |
| References | |
| NUDOCS 8106100456 | |
| Download: ML20126L969 (3) | |
Text
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/,}c wJ RECORD OF TELEPH0fiE C0fiVERSATION l
DATE:. May 12, 1981 PROJECT: Midland RECORDED BY:
Joseph D. Kane CLIENT:
TALKED WITH:
CPCo COE Bechtel NRC l
.\\
D. Sudzik W., Otto N. Swanberg D. Hood J.
R. Ranunfam H. Singh S. Paris R. Knop R. Teuteberg
- 0. Boyd F. Hawkins J. Kane ROUTE TO:
FOR INFORMATION G. Lear L. Heller D. Hood W. Paton R. Gonzales J. Kane H. Singh, COE
~
PAIN SUBJECT OF C'LL:. PERMANENT PLANT _ DEWATERING (REFER TO J. W. COOK'S LETTER OF AFRIL 24, 1981 TO HAROLD R. DENTON)
ITEttS DISCUSSED:
1.
Consumers Technical Specification 722C-C88 on Area Ieviatering which was an enclosure to J. W. Cock's April 24, 1931 letter. - Re:crendaticns frcm the review of Spec. CSS by the COE and GES were given to CPCo and Eechcel in this ccnference call.
CPCo had requested that NRC review S;ec C-SS in order to convince the Staff that installation of the 2D back-up interceptor wells (S-1 through B-20) would be completed in an acceptable manner.
Rec 0=endaticns and modifications on Spec CSS included,:he followinc:
a.
Page 7, Par. 6A l'.
Paragraph requires revision to include the well installation operations, other than monitoring of fines, that are to be Q-listed.
Requiring the installation of wells to be conducted under the supervision of an experienced geologist /hydrogeologist will be covered by Sechtel in Par.10 0.2.a.
The laboratory method for detemining the quar.tity of soil particles in the well discharge water should be added to the Spec. The method is " Standard Methods for the Examination of Water and Wastewater," Total Suspended Matter (nonfilterable residue),13th Edition 1971.
82861001h
b Page 7, Par. 6A 2.
Clarification by Sechtel is required on how the
" average" quantity of fines in the well discharge water is to be established.
NRC cautioned against the adoption of a cumulative average that would obscure the need for corrective action should loss of soil fines begin to develop in any well.
c.
Page 8, Par. 6A2, lines 3 and 11.
Consumers has accepted the 0.005 mm filter medium previously recommended by the NRC.
Changes to 0.005 rn are now required in the Spec.
A d.
Page 8, Par. 6?2, lines 22-25.
Clarification by Sechtel is needed on
" average" ratio of fines.
Consideration is to be given in establishing variable limits of fines for varying amounts of water pumped, e.
Page 9, Par. 6A4, line 4.
Delete words "information only and is not to be part of".
f.
Page 9..
Paragraphs 6A.3, 7 and 9 are missing from Spec C-?S because cf 3echtel's desire to separate requirements on a tem;orary cor.struction dewatering system from a permanent dewatering system.
Ccnsumers and Bechtel to reconsider the need for having totally independent specifications.
NRC to be notified of their decision.
g.
Page 10, Par. 10C.
The later ASTM standard F430-30 will be used and correction to this referenced code will be'made.
The previously identified test standard in item a is to be added to Par.10C.
h.
Page 11, Par.1003, line 10.
Eechtel inCicated that their experienced geologist will classify the soil samples taken during the drilling of the wells.
NRC indicated that there is a need to add a requirement to this paragraph which will require, as a minimum, an approved method of continuous sampling in every fourth well (approximately 100 foot length) in the depth interval where the filter pack is to be placed to verify the adequacy of the filter pack gradation. Sailer sampling is not an acceptable method.
SPT sampling would be acceptable.
Sechtel to meet with their denatering contractor and attenc.t to establish a sampling method that would be acce? table to the NRC staff.
i.
Page11, Par.10D25). Bechtel indicated that well installation information not listed in this paragraph would be recorded on their pumping well constructicn surcary form which was included as an enclosure to the April 24, 1931 letter.
No further action is required.
e.,
j.
Page 13, Par.10F, la and Ic.
The NP.C staff reques ted that " controlled jetting" noted in this paragraph be expanded to require the following:
(1) Casing shall be required to be placed in the hole during jetting.
(2)-Tne jetting will be restricted to bottom discharge only and will be performed from within the bottom of the casing.
(3) The. return of the drilling water within the casing will be required
,5 at all times during drilling.
(4) Low jetting pressuresas necessary to slowly advance the well hole are required to be used.
k.
Page 13, Par. 10F, 2b. Placement.of the filter pack by tremie pour, rather than pouring from the ground surface, is required to avoid segregation.
1.
Pages 14 and 15, Par. 103 and 10H.
The change in filter medium size requires the changing ~ of the ward " sand" to " soil particles" in several locations in these paragraphs.
m.
Page 14, Par. 10H 1.
Change 0.05 mm to 0.005 rn.
2.
The NP,C staff indicated that the submittal of a revised CSS specification which incorporated' the recommendations and modifications discussed in this' conference call would permit the Staff to indicate to the ASL3 that the Staff had no cbjections with Consumers proceeding in the installation cf the 20 back-up interceptor wells.
3.
Details of a meeting between Consumers, Bechtel and N?.C Pegicn-III, I&E were-to be worked out following this waek's inspection at Midland. The purpose of the meeting is to work out 1 Q/A program for the installaticn of the 20 wells.
b
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