ML20087P741
| ML20087P741 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 03/29/1984 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 28058, 84-03-#1, 84-3-#1, OL, OM, NUDOCS 8404090329 | |
| Download: ML20087P741 (6) | |
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@ Consumem-and Construction Power
,,,,,, m hh Vice President - Projects, Engineering General Offices: 1945 West Parnell Road, Jackson, MI 49201 * (517) 788 0453 March'29,1984 84-03 #1 1
Mr J-G Keppler, Regional Administrator
.US Nuclear Regulatory Commission Region III
.799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND ENERGY CENTER PROJECT DOCKET NOS 50-329 AND 50-330 CONCRETE EXPANSION ANCHORS INSTALLED IN METAL DECKING FILE:
0.4.9.90 SERIAL: 28058 On February 28, 1984, Consumers Power Ccmpany notified ycur staff of a potential 10CFR50.55(e) condition involving the installation of concrete expansion anchors-in metal decking.
This letter is an interim 10CFR50.55(e) report. The attachment to this letter describes the concern and summarizes the investigation and corrective action taking place.
Another report, either interim or final, will be sent on or before May 25, 1984.
JWC/AHB/1r : MCAR-82, Initial Issue, dated March 1, 1984 0404090329 840329 PDR ADOCK 05000329 S
PDR APR 2 W
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OC0384-0028A-MP01
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Serial 28058 84-03 #1 CC:. Document Control Desk.. NRC -
Washington,.DC 2RJCook, NRC Resident-Inspector
' Midland Nuclear Plant
..DSHood,'NRC Office of NRR Bethesda, MD INPO Records Center W
~OCO384-0028A-MP01
3 Serial 28058 84-03 #1 OM/0L SERVICE LIST Mr Frank J Kelley Atomic Safety & Licensing Attorney General of the Appeal Board State of Michigan U S Nuclear Regulatory Commission Ms Carole Steinberg Washington, DC 20555 Assistant Attorney General Environmental Protection Division Mr C R Stephens (3) 720 Law Building Chief, Docketing & Services Lansing, MI 48913 U S Nuclear Regulatory Commission Office of the Secretary Washington, DC 20555 Mr Myron M Cherry, Esq Suite 3700 Ms Mary Sinclair
'Three First National Plaza 5711 Summerset Street Chicago. IL 60602 Midland, MI 48640 Mr Wendell.H Marshall-Mr William D Paton, Esq RFD 10 Counsel for the NRC Staff Midland, MI 48640 U S Nuclear Regulatory Commission Washington, DC 20555 Mr Charles Bechhoefer, Esq Atomic Safety & Licensing Atomic Safety & Licensing Board Panel Board Panel
.U S'_ Nuclear Regulatory Commission U S Nuclear Regulatory Commission East-West Towers, Room E-413 Washington, DC 20555 Bethesda, MD 20014 Ms Barbara Stamaris Dr Frederick P Cowan 5795 North River Road
'6152 N Verde Trail Rt 3 Apt B-125 Freeland. MI 48623 Boca Raton, FL.33433
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Dr Jerry Harbour Mr Fred C Williams Atomic Safety & Licensing-Isham, Lincoln & Beale Board Panel 1120 Connecticut Ave, NW, Suite 840 U S Nuclear Regulatory Commission Washington, DC 20036 East-West Towers, Room E-454 Bethesda, MD 20014 Mr James E Brunner, Esq Consumers Power Company Mr M I Miller, Esq 212 West Michigan Avenue Isham, Lincoln & Beale
' Jackson, MI 49201 Three First National Plaza 52nd Floor Chicago, IL 60602 J0C0384-0028A-MP01
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4 Serial 28058 84-03 #1 Mr D F Judd 1 Babcock & Wilcox-
-PO Box 1260 Mr John Demeester, Esq
.Lynchburg,1NL 24505 L Dow Chemical Building Michigan Division
.Mr. Steve.Gadler,.Esq Midland MI 48640
-2120 Carter Avenue
'St-Paul, MN 55108 Ms Lynne Bernabei Covernment Accountability Project
.Mr P Robert Brown.
.1901 Q Street, NW Clark, Klein & Beaumont' Washington, DC 20009 1600'First= Federal Bldg Woodward Ave.
Detroit, MI 48226 3/14/84 e
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'OCO384-0028A-MP01-l44166 seria1 28058 QUAUTY ASSURANCE PROGRAM 8h-03 #1 MANAGEMENT CORRECTIVE ACTION REPORT
._.,= g MCAR 1 REPORT NO.
82 JOB NO.
7220 Q NO.
DATE March 1, 1984 l* DESCRIPTION (including references):
Consumers Power Company (CPCo) identifi'.ed a potential safety concern regarding the use of concrete expansion anchors installed between the ribs of metal decking (ref: QAR H-10 and SCRE-95). Specifically, it was found that the procedures which eddressed this type of installation did not explicitly delineate the sequence of applying torque and grout to an anchor installed through the valley portion of metal decking (ref: 7220-C-305Q.
(continued on page 2)
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- RECOMMENDED ACTION (Optional) 1.
Continue the test program to determine whether bolt capacity and functionality meets design requirements.
2.
Identify anchors bolts installed in the valley of metal decking which may have been torquad after grout cure.
(continued on page 2)
REFERRED TO IE ENGINEERING O CONSTRUCTION O QA MANAGEMENT O
O PROCUREMENT ISSUED BY N'
C*This concern was reported to the NRC by CPCo as a
- r ProkctOAEng&r Date nneene4m11v rannremble condfrinn on 2/2R/84.
II' REPORTABLE DEFICIENCY NOTIFIED CUENT I
O NO
- D YES s
Profect Q --
- # Date 111 CAUSE CORRECTIVE ACTION TAKEN AUTHORIZED BY Date STANDARD DISTRIBUTION ADDITIONAL DISTRIBUTION AS APPRO*RIATE DMSiON OA MANAGER ENGINEERING MANAGER FORMALREPORTTO CLIENT MANAGER OF OA BPC PRCUECT ENGINEER (if Sectionil Applies)
D*8*
GPD - OA MANAGER OE SUPERVISOR SFPD QA M GER CONSTRUCTION MANAGER PROJECT MANAGER PROJ SUPT /PROJ CONSTR MANAGER CUENT CHIEF CONSTR OC ENGINEER CORRECTIVE ACTION IMPLEMENTED DMSION PROCURENT MGR PROJ PROCUREMENT MGR PROCUREMENT SUPPUER QUAUTY MGR AND DfV SUPPUER QUAUTY MGR VERIFIED BY Project OA Engineer Date
'Descree in space provided and attach rehrence document AAPD-0161
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MCAR 82 Page 2 144166 1.
DESCRIPTION (continued):
As a result, in some cases where grouting under a base plate was required (i.e., in the valley portion of metal decking), the torquing of anchor bolts was performed af ter the grout had reached its design strength.
This raised the concern that where bolt torque is applied after the grout has hardened, the bond between the grout and anchor may prevent-proper setting of the anchor's expansion wedges.
The concern is that a maximum displacement of up to 1/2 inch (depending on bolt size) may occur before the anchor bolt expansion wedges are set.
This additional displacement has an indeterminate effect, without additional study, on the supported system (e.g., piping, etc.).
During the investigative phase of this condition, an additional potential area of concern was identified regarding the shear capacity of expansion anchors installed through metal decking. Specifically, certain bolts may possibly experience a reduction in shear capacity due to a reduced shear cone in the grout because of the minimum edge distance between the anchor bolt and the edge of the grout or concrete.
Although no final conclusion as to safety concern'has been made at this time, the above conditions are considered indeterminate until such time I;
as further test results and evaluation can justify a more definitive conclusion.
RECOMMENDED ACTION (continued):
3.
Identify anchor bolts installed in metal decking which may have potential shear capscity reductions, 4.
Based on items 2 and 3 above, initiate proper controls and remedial action in accordance with project NCR procedures.
5.
Review and revise procedures, as applicable, to provide process corrective action.
6.
Determine root cause of problem and provide corrective. action to l
preclude recurrence.
I 7.
Based on determination of root cause, perform further investigations, as applicable, to determine if similar or related conditions of this type exist on the Midland project.
- 8. -
Issue the first report, interim or final, by April 15, 1984 (concurrence from client was obtained for this date).
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