ML20070S276

Forwards Independent Assessment of Auxiliary Bldg Underpinning,Weekly Rept 14 for 821219-25

ML20070S276
Person / Time
Site:	Midland
Issue date:	12/20/1982
From:	Lucks A STONE & WEBSTER, INC.
To:	Cook R NRC
Shared Package
ML20070S237	List: ML20070S276 ML20070S289 ML20070S293 ML20070S298 ML20070S312
References
MFP-14, NUDOCS 8302040337
Download: ML20070S276 (9)

Text

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STONE 8 WEBSTER ENGINEERING CORPORATION ,

245 SUMMen STRECT, B oST ON. M ASS ACH USETTS .

ADDRE SS ALL CORRESPO$DENCE TO P.O. BON 232S BOSTON. M A SS. 02907 W.U.TELER: 94 0005 l.!'!;.. -**~ ""  !!*.'t,", o c ,,o~ .

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e United States Nuclear Regulatory Commission December 28, 1982 Midland Site Resident Inspection Office Route 7 J.O. NO. 14358 Midland, MI 48640 Ref. MFP 14 t

i Attention Mr. R. Cook RE: DOCKET No. 50-32c/330 Midland Plant - UNITS 1 AND 2 INDEPENDENT ASSESSMENT OF AUXILIARY BUILDING UNDERPINNING REPORT NO. 14 A copy of the Independent Assessment of the Auxiliary Building Under-pinning Weekly Report No.14 for the period Decembe~r 19 through December '

25, 1982, is enclosed sith this letter. Included, as an attachment, are the minutes of the daily meeting's held during the week between members of ,j the Assessment Team and Jite, Engineering, Construction and Quality Assur- ,

ence personnel during the week. l If you h' ave any questions with respect to this report please contact,,me ~ '

ot (617F 589-2067.- -

Very truly yours,

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A. Stanley uc s . -~ ,

Project Manager -

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Enclosures ,

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J. O.'NO. 14358 Midland Plant Units 1 and 2 -

Independent Assessment ,

Auxiliary Building Underpinning .

Weekly Report No. 14 ,

f December 19 through December 25, 1982 Personnel on Site Stone & Webster Engineering Corporation (SWEC)

B. Holsinger 12/20 - 12/23 W. Kilker 12/21 - 12/22 ~

A. Scott 12/20 - 12/21 Parsons, Brinckerhoff,0uade and Douglas (PBQD)

J. atner 12/21 - 12/22 Meetings Attended Date Represented Purpose 12/20 Stone & Webster Daily Meeting througn Bechtel .

12/23 Consumers Power Parsons (12-21/12-22)

• 12/21 Stone & Webster Discussion of assess-Consumers Power'(MPOAD) ment Team activities

1. 1. NRC an.d MPQAD role in -

Parsons implementation of i underpinninggesign

.- 12/21 ,,,' Stone & Webster Discussion o'T require-

- Bechtel ments for vibration of Consumers Power concrete in pier bells, NRC' update on settlement I monitoring data, and NRC. restriction on _

j non - auxiliary build-ing underpinning activi-ties. .

Activities

.k Construction - The advancement of the pier W12 drift excavation was restricted to removing approximately 1 foot of concrete at the toe of the face to about j 4 ft. at the top or the drift.

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"J. O..NO. 14358 Midland Plant Units 1 and 2 ,

Independent Assessment Auxiliary Building Undcrpinning 2 -

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The concrete was removed by initially advancing 2 inch diameter drill holes space at 1 Tt. - 13 ft. centers to a depth of 1 f t. - 2 ft. and subsequently -

a hydraulic rock splitter was utilized to dislodge the concrete. [

t Minor quantities of perched groundwater entered the etcavation in the north- 1 east corner of the pier W12 access drift along a narrow band of soil between j the access pit lagging and the lean concrete encountered under the turbine  :

building. The seepage was not sufficient to cause instability or loss of ground in the soil mass. The water was controlled by directing it to a sump hole in the access pit and then removed by pumping.

Construction was initiated on the pier E12 acce'ss pit. The 6 ft. x 8 ft.

pit was excavated from El 609] to El 601. Lagging, similiar to that used

'in the pier W12 accces pit, was inctalled on three sides of the pit as the excavation progressed. A formed vertical face of concrete was encountered on the south side of the pit immediately under the turbine building found-ation mass. Once the pit reached El 601 lagging boards were also installed on the south face. Backpacking and excelsior placement procedures were similar to those employed to complete the pier W12 access pit. .

Minor perched groundwater seepage, estimated at less than 0.1 gpm, entered [

the . pit between the lowerlevels of the east side lagging. A sump hole was ( '

dug in the pit to collect the seepage and the water was then pumped out. ,

Quality Control, Documentation.and Records -  ;

1. Observ.pd.:the methodology of proficiency testing of the Quality Control, Inspect 6rs by the QA engineers on the access pit and , drift excavation /' j

fl lagging 'hnd anchor bolt installations. e '

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2. cRevf8wed -Quality Control Instructions on excavation / lagging, field fabrication of miscellaneous items for lagging, miscellanous steel and -

steel sets. . .

w Observations Construction - The removal of the mass Ican concrete in the W12 pier access rift proceeded according to project requirements. Perched groundwater seep-rge was properly controlled. , Careful observations were r.aintained by the contractors orthestability of a narrow band of soil between the access pit Cnd lean concrete mass. ,il Quality Control, Documentation and Records -

The Assessment Team considered the QA methodology of proficency training of inspectors to date to be quite adequate. An addition, the quality inspector procedures reviewed by the team will, (when implemented) assure adequate control of the activity.

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J. O. NO. 94358 Midland Plant '

Units 1 and 2 .

2 Independent Assessment .

Auxiliary Building Underpinning 3

.j Non-Conformance Identification Reports Status of previous issues: (NIR numbers no longer listed have been cic, sed-

! out during previous weeks.) .

i NIR NO. Description Datt; j (Open)

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(Closed) i 3 Coupler Testing 12/14/82 Temperature s.,

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Project. Manage'r '

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INDEPENDENT ASSESbdENT TEAM MEETING WITH BECHTEL Date: De'cember 20, 1982 -

Attendees: Bechtel Stone / Webster MPOAD CPCo J. Fisher A. Scott L. Kettren R. -Welland  ;

E. Cviki B. Holsinger {

1. J. Fisher mentioned visit of the NRC with Assessment Team on December 21, 1982.

2. B. Holsinger discussed concerns with stainless steel to carbon steel I welding qualification procedure.

3 J. Fisher mentioned that Bechtel would have a daily 4:30 PM meeting between Bechtel and Mergentine to clear up problems of the day &

prepared for next day work. l 1

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INDEPENDENT ASSESSMENT TEAM MEETING WITH EECHTEL .

Date: December 21, 1982 Attendees: Bechtel Stone / Webster MPOAD CPCo

. R. Bradford W. Kilker A. Scott B. Holsinger

1. A. Scott requested that R. Bradford expedite the team request for Mergentime prints.

2. A. Scott requested results of recent tests on the " mud-mat" nix.

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1 INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL Date: December 22, 1982 Attendees: Bechtel Stone / Webster MPOAD CPCo R. Brauford W. Kilker ------ =--==

E. Cviki B. Holsinger Parsons J. Ratner

1. J. Ratner asked two questions on which E. Cviki referred him to M. Lewis for clarification.

A. Does 2 ft. of groundwater level below excavation restriction apply in the present access pit advancement.

B. ,'Can the top of the drift advance more than 9" beyond the 1st:

giftseteventhoughtheworkisintheconcrete.

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B. Eolsinger advised that an NIR will be issued on a procedure, vs AWS code conflict on stainless to ca'rbon steel welding. ,

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INDEPENDENT ASSESSMENT TEAM MEETING WITH BECHTEL .

Date: December 23, 1982 MPOAD CPCo Attendees: Bechtel Stone / Webster B. Holsinger S. Jagdish G. Murray R. Bradford E. Cviki i

1. G. Murray advised that the NRC will centinue to require a one-week lag-time between piers W12 and E12 once the concrete removal is complete. CPCo will issue a memorandum,.

2. E. Cvikl noted that if Bechtel's action is required on any of the Assessment Team issued NIR's,MP0AD or SMO should see to it they recevie a copy at the earliest possibic date.

3 B. Holsinger' observed that in his opinion the Soils Remedial /MPQAD group is now functioning better organization 211y than upon his arrival on-site in Ssptember 1982.

4. M. Lewis has answered the two questions of J. Batner (see notes 6f

' December 22, 1982.) . ,

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• A. Groundwater encountered in pit is perched and does not need '

to be maintained 2 ft. below working level. *

'i E.N3 i B. The top of the drift chn be advanced to the location of the ,j

~* next drift set but the bottom can only go 9 inches beyond l

the first drift set location.  ;

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Frtgett Proct cur e E-?.0 Attachment 3 Page 3 of 3 ,

STONE AND NEBSTER ENGINEERING CORPORATION NONCONTORMANCE IDENTIFICATION REPORT Decenher pg 3qsp NIR Number a DATE OF NDNCONFORMANCE:

IDENT]FICATION/LOCAT]ON OF ]TEMS: Mergentime procedure on welding (MCP 19.000 c+ nni +n rerw en eteel .el e m y Fev 6) - aualifiention re stri nti nns nn etnininee (Refer to Attachment F MEP 10 1 DESCR3PTJON OF NONCONFORMANCE:

The project procedure permits electrode weld wire sizes that exceed the size used in the qualification process - in this 6ase 1/8 inch and 81/"42 i ne h diprontor Thn t.L'c n1_1~~ fin

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70 rni +- ~sI_a restricts the use of electrode sizes only to those size'sou'a'I'ifieTd 6v"dernonstration (Refers to ogs 25 and 26-29 of MCP 19) . In additinn_ the nen n a ritir a n 11.t-nt.n,whl o e e,,e,4c4-,+4mm ,- , v.. _ .t--

on amnernee nna vn1 + nen nyrnoa +wo ~- ~

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variance Aticulatfd iO?' 35.1 (Ref'er t6 ~pgs ~f5' and 'f 6-f 9"R'MdP'T9 f?' '"

DATE: PROJECT MANAGEMENT CONCURRENCE:

J N]T ] AT OR:

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. :. 's CORRE CTIVE ACT10N BY:

.g, (IDENT]FY ORGANIZAT10N TAK]NG CORRECT-IVE ACTJON) 3 '

PROJECT MANAGCMENT CONCURRENCE: DATE:

JN]T1 ATOR CONCURRENCE:

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