ML19329E432
| ML19329E432 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 09/29/1978 |
| From: | Howell S CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | |
| References | |
| HOWE-183-78, NUDOCS 8006120823 | |
| Download: ML19329E432 (9) | |
Text
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4 OJ) 1, consumers i
? POWBf THIS DOCUMENT CONTAINS Company POOR QUAUTY PAGES vu,c,,,u,n, General Of fices: 1945 West Pernall Road, Jackson, Michigen 49201
- Area Code 517 788-0453 September 29, 1978 Hove-183-78 f!E9i!LAI0iU MT FILEE0PY
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Mr J G Keppler, Regional Director o
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Office of Inspection and Enforcement ReSion III i
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MIDLAND IiUCLEAR PLANT -
UNIT NO 1, DOCKEP NO 50-329 UNIT NO 2, DOCKET NO 50-330 SEITLDENT OF DIESEL GENERATOR FO'INDATIONS AND BUILDING In accordance with the requirements of 10 CFR 50 55(e), this letter constitutes an interim report on the status of the settlement of the diesel generator foundations and building.
A description of the conditions relative to the settlements and the investigative actions planned are documented in the enclosures to this letter.
Another report, either interim or final, vill be sent on or before November 17, 1978.
A-
Enclosures:
1)
Quality Assurance Program, Management Corrective Action Report, MCAR-1, Report 24, dated September 7, 1978.
- 2) Letter, P A Martinez to G S Keeley, BLC-6578, MCAR-24, Interim Report fl, dated 9/22/78, with attached report.
CC: Director, Office of Inspection & Enforcement Att: Mr John G Davis, Acting Director, USNRC (15)
Director, Office of Management l
Information and Program Control, USNRC (2I 8006120 b3 7eteoot42 lh5 3
Enclosure 1
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QUALITY ASSURANCE PROGRAM MANAGEMENT CORRECTIVE ACTION REPORT MCAR 1 REPORT NO.
1 JOB NO.
7770 0 NO.
1_40 DAT E 4/7/7R I ' DESCRIPTION (including references):
The Bechtel " Foundation Data Survey Program" has indicated that the settlement
, cf the Diesel Generator Building has been greater than expected.
This has been documented in NCR-1482 dated (8/21/78).
A preliminary evaluation of soil boring data from an investigation being conducted by Project Engineering indicated that the magnitude of the investigative tests and analysis of test results makes this item roportabic under 10CFR50.55 e, 1, iii.
- RECOMMENDED ACTION (Optional) 1.
Determine the amount of settlement of the Diesel Generator Building (DGB) and increase the frequency of foundation survey measurements to find if the setticaent is or will be excessive.
2.
Determine the cause of the settlement.
3.
If the settlement is or will be' excessive, determine what actions are required to correct the condition and preclude recurrence.
REFERRED TO X ENGINEERING CONSTRUCTION QA MANAGEMENT Drnicihnch o/7/78 ISSUED BY I,.
1.
Date Project GA Engineer 11 REP ( 1 TABLE DISCREPANCY TIFIED CLIENT 97/ ~7Y WM-NO I YES M
8 P'
Proget Maneger J/ ate / //
Ill CAUSE CORRECTIVE ACTION TAKEN
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d,a@l::.usn:; (; u pyr -
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SEP 81978 QUAL.iiY 55E2AUCE AUTHORIZED BY Date oistnieurioN:
J.B. Violette FORMAL REPORT TO CLIENT P;ol.ct Menes*'y S.I. Heisler og secuen n Appuess o,,,
Ql,',Tl *a M e.. cssas L.A. Dreisbach
L*IaY/,'d,*. "A."u's.
J. Amaral (Gaithersburg) CORRECTIVE ACTION IMPLEMENTED
'"N.'.,.",oIn"Ti.J u,,.
J.E. Bashore (Norwalk)
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VERIFIED BY
' Describe in spece provided and ettoch reference document.
Project QA Enginnr Date 1N1 1 Of
Enclosure @
nove-183-78
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Bechtel Power Corporation o
777 East Eisenhower Parkway Ann Arbof, Michigan We.i Acaress P.O. Box 1000, Anti Arbor. Michsan 48106 September 22, 1978 BLC-6578 Mr. G. S. Keeley Project Manager CONSUMERS POWER COMPAh7 1945 West Parnall Road Jackson, Michigan 49201 Midland pnits 1 and 2 Consumers Power Company Bechtel Job :7220 MCAR'24 INTERIM REPORT 1 Files 2417/2801
Dear Mr. Keeley:
Attached is Interim Report 1 addressing the Deisel Generator Building Settlement as described in MCAR 24 (issued September 7, 1978).
As agreed with W. R. Bird on September 21, 1978, the.next report will be issued November 3,.1978.
Very truly yours,
~~
Project Manager PAM/WGM/pp cc:
Mr. R. C. Bauman
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Mr. W. R. Bird Mr. J. L. Corley Mr. B. W. Marguglio Attachment (5 pages).
SEP25 Ig7g GMUlvASSURMCE
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Bechtel Associates Professional Corporation 4
Attachment to BLC-6578
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$UBJECT:
MCAR #24 (Issued 9/7/78)
Settlement of the diesel generator foundations and building INTERIM REPORT # 1 DATE:
September 22, 1978 PROJECT:
Consumers Power Company Midland Plant Units 1 & 2
~
Bechtel Job 7220 Introduction This report summariz'es the project's actions relating to the settlement of the diesel generator f,oundations and building as described in MCAR
- 24 and NCR 1482.
The fill material in,this area was placed between ?.975 and 1977.
Construction was started on the diesel generator 'ouilding in mid-1977.
The diesel generator building settlements were noticed to exceed anticipated
' values in July 1978. The diesel generator building construction was placed on hold on August 23, 1978. A diesel generator building soil boring program was started on August 25, 1978.
Based on preliminary soil boring data evaluation, MCAR #24 was issued.
The actions requested by MCAR #24 are being performed as follows:
~
1)
The Foundation Data Survey Program, Specification 7220-C-76, has been expanded by increasing the number of data locations and the frequency of measurements.
2)
The cause,of the settlement and the corrective actions required to preclude the recurrence of this condition will be addressed after the testing and monitoring programs have been evaluated.
3)
The options availa'ble to resolve the existing settlement conditions will be discussed in'the Corrective Actions section.
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Bechtel Associates Professional Corporation NCAR # 24 INTERIM REPORT 1 Page 2 September 22, 1978 Attachment to BLC-6578 Deficiency The Bechtel Foundation Data Survey Program (Specification 7220-C-76) generated data that indicated the settlement of the diesel generator foundations and building-was greater than anticipated.
Nonconformance Report 1482 was generated on August 21, 1978, describing the settlements.
The general foundation and building settlements, as of September 19, 1978, are shown on Figure 1 (attached).
Due to the magnitude of the settlements observed, a soils boring program
.was started.
Based on the borings c'ompleted to date, the fill under the building has variable strength properties ranging frop good to poor.
Further clarification of the fill deficiency will be made when the soil test results have been completed and evaluated.
An independent soils consultant has been retained to help in the data evaluation and feasibility of the corrective actions.
Safety Implications A
Large settlements can pose possible safety problems for buildings.
-preliminary evaluation of soil boring data from the-investigation being conducted indicates that the magnitude of the investigative tests and analysis of test results makes this item reporta'le under 10 CFR 50.55 e, b
1, iii.
These structures are monitored for settlement as part of the foundation data survey program.
Hence, any unusual settlement of the structure would be detected before the diesel generators would be rendered inoperable due to the resulting distortions.
Activities in Progress Several activities are in progress to generate information needed to evaluate the feasibility of possible corrective actions.
The activities are:
1)
The Foundation Dat'a Survey Program has been expanded to. include additional settlement data locations as well as monitoring these data locations mo're f requently.
Building time rate of settlement k
curves are being developed based on this datum for a better under-standing of the problem.
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i Bechtel Associates ProfessionalCorporation MCAR #24 1NTERIM REPORT 1 Page 3 September 22, 1978 Attachment to BLC-6578 2)
A boring program has been initiated to provide better. definition of the fill conditions under the building and to obtain soil samples for laboratory tests.
Dutch cone penetration tests are also being yierformed under the building area to better define the variable strength properties of the fill material.
3)
Laboratory tests being performed are:
Shear strength tests to determine fill characteristic for a.
bearing capacity evaluation' b.
Consolidation tests to predict building settlement for the present fill material
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Soil classifications d.
Mineralogy tests to evaluate the swelling potential of the fill material
/
/
This portion of the Bechtel Report is deleted because it contains a premature discussion of Possible corrective action options. Specific options vill be included in subsequent reports following a complete evaluation of soil conditions.
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J' Bechtel Associates ProfessionalC rporation MCAR f24 IhrERIM REPORT 1 Page 4 September 22, 1978 Attachment to BLC-6578 Detailed descriptions of the selected options will be presented in subsequent repo
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-"7-SETTLEMENT' DATA As CF 9-19-78 JT i
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to 05/9s REGULATORY INFORMATION DISTRIDUTION SYSTEM (RIDS)
DISTRIFUTION FOR INCOMING MATERIAL M-32h30 REC: KEPPLER J O ORG: HOWELL S H DOCDATE: 09/29/78 NRC CONSUMERS PWR DATE RCVD: 10/03/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED LTR 1 ENCL 15 SUDJECT:
FORWARDING INTERIM CONSTRUCTION DEFICIENCY REPT CONCERNING STATUS OF THE SETTLEMENT OF SUDJECT FACILITY"S DIESEL OENERATOR FOUNDATIONS AND BUILDINGS HAS BEEN GREATER THAN EXPECTED.
W/ATT SUPPORTING INFO.
PLANT NAME: MIDLAND - UNIT 1 REVIEWER INITIAL:
XJMp,Jt)
MIDLAND - UNIT 2 DISTRIDUTER INITIAL:
ono*ne*********** DISTRIDUTION OF THIS MATERIAL IS AS FOLLOWS ******************
CONSTRUCTION DEFICIENCY REPORT (10CFR50.55E)
(DISTRIBUTION CODE B019)
FOR ACTION:
ASST DIR VASSALLO**W/ ENCL DR CHIEF LWR #4 BC**W/ ENCL PROJ MGR D HOOD **W/ ENCL "-
INTERNAL:
M*4 4/ ENCL
,<RC PDR**W/ ENCL m,-.a2 ENCL DELD**W/ ENCL 1
v.
OOSSICK & STAFF **W/ ENCL MIPC**W/ ENCL DIRECTOR DPM**W/ ENCL DEPUTY DIR DPMn*W/ ENCL QAB**W/ ENCL DIRECTOR DSS **W/ ENCL AD FOR ENG**W/ ENCL AD FOR REAC SFTY**W/ ENCL AD FOR PLANT SYSTEMS **W/ ENCL AD FOR SYS & PROJ**W/ ENCL STANDARDS DEV.**W/ ENCL K SEYFRIT/IE**W/ ENCL FERD DREHER/IE**W/ ENCL EXTERNAL:
LPDR'S MIDLAND, MI*nW/ ENCL TERA **W/ ENCL NSIC**W/ ENCL ACRS CAT A**W/16 ENCL DISTRIEUTION:
LTR 41 ENCL 41 CONTROL NBR:
781600142 SIZE: 1P+1P+6P onor3******************************
THE END
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