ML20079E811
| ML20079E811 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/06/1984 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 26652, 83-12-#1, NUDOCS 8401170447 | |
| Download: ML20079E811 (7) | |
Text
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Coilsumers Power Company t"7,",SL j,,,o.,,,,,.,
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oeneral offices: 1945 West Parnali Road, Jacksc i., MI 49201 * (517) 788-0453 January 6, 1984 83-12 #1
, pal 4CIPAL STAFF Mr J G Keppler, Regional Administrator A*
US Nuclear Regulatery Commission
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Region III
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MIDLAND ENERGY CENTER PROJECT DOCKET NOS 50-329 AND 50-330 ITT CRIFNELL MECHANICAL SNUBBER ASSEMBLIES FILE:
0.4.9.84 SERIAL:
26652 On December 9, 1983, Consumers Power Company notified your staff of a potential 10CFR50.55(e) condition involving interference problems associated with ITT Grinnell mechanical snubber assemblies.
This letter is an interim 10CFR50.55(e) report. The attachments to this letter describe the concern and summarize the investigation and corrective action taking place.
Another report, either interim or final, will be sent on or before March 23, 1984.
l JWC/AHB/lr Attachments:
(1) MCAR-1, Report No 76, dated December 13, 1983 (2) MCAR-76, Interim Report 1, dated December 21, 1983.
CC: Document Control Desk, NRC Washington, DC RJCook, NaC Resident Inspector Midland Nuclear Plant DHood, USNRC Office of NRR INPO Records Center 0401170447 840106 PDR ADOCK 05000329 g
OC0184-0007A-MP01 Q AN 12
2 Serial 26652 83-12 #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, Esq Washington, DC 20555 -
A.4sistant Attorney General Environmental Protection Division Mr C R Stephens (3) 720 Law Building Chief, Docketing & Services Lansing, h1 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 Marsha*1 Mr William p 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 H S Nuclear Regulatory Commission Washington, DC 20555 Washington, DC 20555 Dr Frederick P Cowan Ms Barbara Stamiris 6152 N Verde Trail 5795 North River Road Apt B-125 Rt 3 Boca Raton, FL 33433 Freeland, MI 48623 Mr Fred C Williams Mr Jerry Harbour Isham, Lincoln & Beale Atomic Safety & Licensing 1120 Connecticut Ave, NW, suite 325 Board Panel Washington, DC 20036 U S Nuclear Regulatory Commission Washington, DC 20555 Mr James E Brunner, Esq Mr M I Miller, Esq Consumers Power Company Isham, Lincoln & Beale 212 West Michigan Avenue Three First National Plaza Jackson, MI 49201 52nd Floor Chicago, IL 60602 Mr D F Judd Mr John Demeester, Esq Enhcock & Wilcox Dow Chemient Buf1 ding PO Box 1260 Michigan Division Lynchburg, VA 24505 Midland, MI 48640 Mr Steve Gadler, Esq Ms Lynne Bernabei 2120 Carter Avenue Government Accountability Project St Paul, MN 55108 1901 Q Street, NW Washington, DC 20009 OC0184-0007A-MP01
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Serial 26652 QUALITY ASSURANCE PROGRAM MANAGEMENT CORRECTIVE ACTION REPORT c
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MCAR 1 REPORT NO.
76 JOB NO. 7220 O NO.
DATE 12/13/83 l' DESCRIPTION (including references):
ITT Grinnell Figure 306/307 mechanical snubber assemblies supplied to the Midland project may experience significant Interference problems during plant operation. Specifically, an attachment Interference between the ITT Grinnell attachment clasps er.d their associated Pacific Scientific snubtsrs may exist on certain assemblies which could restrict lateral pipe movement in either direction and cause binding of the snubber, thereby impatrir.g the safety function of a (continued)
- RECOMMENDED ACTION (Optional) 1.
Prepare a listing of all ITT Grinnell mechanical snubbers produced and delivered to the Midland project prior to October 1978 and between October 1978 and April 1980. This list should include, as a minimum, a cross reference to the P.O. number, the hanger installation / sketch number for which the snubber was used, and the installation / location status of subject assemblies.
(continued)
REFERRED TO 00 ENGINEERING O CONSTRUCTION O QA MANAGEMENT O
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- 8 3 O PROCUREMENT ISSUED BY NOTE: This deficiency was reported as a potential farProjectOA Engineer [
Date 90.55 M condition to tije NRC by the client en 12/9/83.
Il REPORTABLE DEFICIENCY NOTIFIED C' T
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til OAUSE CORRECTIVE ACTION TAKEN AUTHORIZED BY Date STANDARD DISTRIBUTON ADDITONAL DISTRIBUTON AS APPROPRIATE FORMAL REPORT TO CUENT FNGNEERNG MANAGER Date DfVISON OA MANAGER PRNECT ENGNEER (if SectionII Applies)
MANAGER OF OA BPC CC SUPERVISOR GPD - OA MANAGER D
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CONSTRUCTON MANAGER sppD 0 MANAG R PROJ SUPT /PROJ CONSTR MANAGER PROJECT MANAGER CHIEF CONSTR OC ENGNEER CLIENT CORRECTIVE ACTION IMPLEMENTED DMSON PROCURENT MGR PROJ PROCUREMENT MGR PROCUREMENT SUFDUER OUAUTY MGR AND DIV SUPPUER QUAUTY MGR VERIFIED BY Project GA Engineer Date
' Describe in space provided and attach reference docurnent.
AAPD-0161
9 9
MCAR 76 Page 2 Description (continued):
given piping system. ITT Grinnell has determined that all mechanical snubbers produced prior to j
October, 1973 should be reviewed for adequate clearances. In addition, whanical snubbers produced and shipped by ITT Grinnell between October, 1978 and April, 1980 may exhibit a reduction of the included angle cone of action.
The above condiflons, If left uncorrected, could lead to Impairment of safety function of the 1
piping system. (Ref: IE Bulletin 83-20; CPCo letter file M-106, serial 23248; DT Perry to EM Hughes, detec 6/14/83.
Recommended Action (continued):
2.
Upon ce,istion of item I above, ensure that all suspect snubbers are controlled in accordance with prohet procedures for nonconforming items.
3.
Perform en evaluation to determine Impact on safety of operations at Midland.
4.
Provide for examination of all identified snubber assemblies (from item I above) and Initiate remoolal corrective action as required.
5.
Determine what verification / Inspection ey QC is required upon completion of remedial action from item 3 above.
6.
Review and concur with ITT Grinnell's identified root cause of the deficiency and actions to preclude recurrence.
7.
Issue Interim or final report by December 26, 1983.
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Serial 26652 Bechtel Associates Professional Corporation
SUBJECT:
MCAR 76 ITT Grinnell Figures 306 and 307 Mechanical snubber Attachment Interference INTERIN REPORT 1 DATE:
December 21, 1983 PROJECT: Consumers Power Company Midland Plant' Units 1 and 2 Bechtel Job 7220
REFERENCE:
ITT Crinnell letter to Bechtel, 11/16/82 (Com 095537)
Introduction This report addresses IIT Crinnell Figures 306 and 307 mechanical snubbers supplied to the Midland project with potential interference problems.
Interference may occur at the pipe clamp and/or between the shock arrestor pivot mount and rear bracket.
Description of Deficiency ITT Grinnell Figures 306 and 307 mechanical snubbers require an included angle cone of action to the pipe clamp axis to accommodate anticipated piping movements relative to the supporting structure.
Crinnell has informed Bechtel that for Figures 306 and 307 snubbers manufactured before Apell 1980, the included angle of the cone of action may be less than the design angle.
Summary of Investigation and Historical Background As discussed in the reference, ITT Grinnell has investigated the subject deficiency and determined the following.
l 1.
All mechanical snubbers produced and shippen by ITT Grinnell before l
October 1978 should be reviewed to assure sufficient clearance.
I 2.
All sechanical snubbers produced and shipped by ITT Grinnell after April 1980 are acceptable based on design changes incorporated at that time.
3.
Mechanical snubbers produced and shipped by ITT Ceinnell between October 1978 and April 1980 may exhibit a reduction of the included angle cone of action, pseticularly:
a.
All mechanical snubbers that incorporate welded rear brackets; and b.
Size 3 and 35 pipe clamps 0506u
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f Bechtel Associates Professional Corporation
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NCAR 76 Interim Report 1 December 21, 1983 Page 2 For the Midland project, future investigation will address the subject deficiency for the Figures 306 and 307 snubbecs.
Analysis of safety Impilcation The potential interference (s) could restrict the pipe movement more than the stress analyst intended and analyzed. This could lead to piping stresses beyond Code limits and possible impairment of system safety function.
Pr'obable Cause Project engineering shall obtain from IIT Grinnell an explanation of the root cause and a plan for corrective action to preclude recurrence of the subject deficiency before the final MCAR report is issued.
Corrective Action Bechtel field engineering will be requested to initiate a nonconformance report to identify and track this deficiency. All ITT Grinnell Figures 306 and 307 snubbers furnished to the Midland plant will be evaluated.
Repair and/or replacement procedures and provisions for verification or inspection will be provided for in the nonconformance report disposition.
Reportability Based on safety implications, this deficiency was reported to the ERC as potentially reportable in accordance with Title 10 of the code of Federal Regulations, Part 50.55(e) on December 9, 1983.
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.. I b 6 3. 9 6 Bechtel Associates Professional Corporation MCAR 76 Interim Report 1 December 21, 1983 Page 3
[ Q [ b Submitted by:
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e E.B. Poser Project Engineering Manager
.GbA Approved by:
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.H. SmitY
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Engineering Manager Concurrence by:
hMdb far. M.A.Dietricf' Project Quality Assurance Engineer RFT/MS/jr.h*(PD) 0506u
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