ML20023C376
| ML20023C376 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 05/06/1983 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 22184, 80-04-#9, 80-4-#9, MCAR-40, NUDOCS 8305170283 | |
| Download: ML20023C376 (9) | |
Text
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@ Consumers Power James W Cook 0
00f Vice President - Projects, Engineering and Construction General offices: 1945 West Pernall Road, Jackson, MI 49201 (517) 788-0453 May 6, 1983 80-04 #9 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 HELBA RESTRAINT DESIGN FILE:
0.4.9.41 SERIAL:
22184
References:
J W Cook letters to J G Keppler, Same
Subject:
(1) Serial 8830, dated September 19, 1980 (2) Serial 10070, dated December 1, 1980 (3) Serial 11525, dated April 3, 1981 (4) Serial 13663, dated September 4, 1981 (5) Serial 14634, dated December 14, 1981 (6) Serial 16147, dated March 31, 1982 (7) Serial 19039, dated September 15, 1982 (8) Serial 20686, dated January 30, 1983 This letter, as were the referenced letters, is an interim 50.55(e) report concerning HELBA restraint design. Enclosure I provides a current status of the actions being taken with regard to this matter.
Another report, either interim or final, will be sent on or before February 20, 1984.
JWC/WRB/cd : MCAR-40, Interim Report 9, "High-Ener8y Line Break Analysis (HELBA) Pipe Whip Restraint Designs," dated April 18, 1983 CC: Document Control Desk, NRC Washington, DC RJCook, NRC Resident Inspector Midland Nuclear Plant MAY 91983 OC0483-0036A-MP01 8305170283 830506 PDR ADOCK 05000329 1pel/
S PDR
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Serial 22184 80-04 #9 CC: CBechhoefer, ASLB Panel RSDecker, ASLB Panel FPCowan, ASLB Panel AS&L Appeal Panel MMCherry, Esq MSinclair BStamiris CRStephens, USNRC WDPaton, Esq, USNRC FJKelley, Esq, Attorney General SHFreeman, Esq, Asst Attorney General WHMarshall GJMerritt, Esq, TNK&J INPO Records Center OC0483-0036A-MP01
Bechtel Associates Professional Corporation i i 2218 Ii.2.562 Management Corrective Action Report (MCAR) l
SUBJECT:
MCAR 40 (issued 8/26/80)
High-Energy Line Break Analysis (BELBA)
Pipe Whip Restraint Designs INTERIM REPORT: 9 DATE:
April 18, 1983 j'
PROJECT:
Consumers Power Company Midland Plant Units 1 and 2 Bechtel Job 7220 Introduction This report provides the current status of MCAR 40 and actions performed since Interim Report 8.
I Description of Deficiency FSAR Section 3.6.2.2 states that the analysis of the thrust forces which result in the event of a pipe rupture is described in BN-TOP-2.
Contrary to the intent of BN-TOP-2, the steady-state thrust forces rather than the transient peak thrust forces were used in the energy balance techniques for the design of HELBA pipe whip restraints.
Summcry of Investigation All of the blowdown thrust force time histories have been determined using the computer program PRTHRUST and comparable hand calculations.
The restraint designs have been evaluated with the PIPERUP computer program as discussed in Corrective Action below.
Analysis of Safety Implication The safety-related function of a pipe whip restraint is to limit pipe movement following a high-energy line break to prevent unacceptable damage to essential systems or components. Designing the restraint using the steady-state thrust force instead of the higher transient thrust force could compromise this safety function. The size of the restraints may be inadequate for the increased loads, and/or their location may be inadequate as a higher thrust force may cause the plastic hinge length to decrease outside the range of the restraint. This deficiency, were it to have remained uncorrected, may have adversely affected the safety of operations at the Midland plant if certain types of accidents were to occur.
..__.y
Bechtel Associates Professional Corporation 12 2 I B MCA d
Interim Report 9 Page 2 Probable Cause The probable cause of this discrepancy has been identified as a misinterpretation of the requirements of BN-TOP-2.
Corrective Action Status of Restraint Reanalysis:
The attached table shows the current status of restraints potentially affected by the concern of this MCAR.
The initial population of restraints affected originally was 325.
Deletions due to pipe rerotting, shifts in break locations, changes in analysis assumptions, etc., have reduced the number of affected restraints to 116.
Analysis has been performed on all 116 restraints. However, because some of the calculations containing the analyses have not yet been finalized, the restraint evaluation cannot yet be considered complete.
The analyses show that 33 of the 116 affected restraints meet design requirements and 83 require modifications. The reanalysis has been integrated into the normal HELBA production work and, as such, does not permit easy differentiation of the effects of the use of the revised thrust forces from the effects of other modifications. Therefore, the restraints which require modifications do not necessarily do so because of the MCAR 40 problem.
Based on a review of the blowdown time histories, it is estimated that no more than half of the 83 restraints which require modifications require them because of the MCAR 40 problem.
This is about 8% of the total pipe whip restraints in the plant. The design drawings associated with these 83 restraints are being revised.
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MIDLAND UNITS 1 AND 2 STATUS OF PIPE WHIP RESTRAINTS AFFECTED BY MCAR 40(1) r%)
Restr Mod.
Mod.
System Pipe (2)
Install Constr Size OK Loc OK Size OK Loc OK Needed Needed ID Restraint Bldo
(%)
Hold Phase I Phase I Phase II Phase II Size Loc C3?
i Inside Containment DH return line PR-610-2-6 Reactor 50 No No No No No Yes Yes DH return line PR-610-2-8 Reactor 50 No No No Yes Yes No No s,3 DH return line PR-610-2-10 Reactor 50 No No No No No Yes Yes DH return line PR-610-2-12 Reactor 50 No No No No No Yes Yes
- D DH return line PR-611-2-3 Reactor 100 No No No No No Yes Yes Na DH return line PR-611-2-5 Reactor 100 No No No No No Yes Yes DH return line FR-611-2-9 Reactor 100 No No No Yes Yes No No DH return line PR-611-2-12 Reactor 0
No No No No No Yes Yes DH return line PR-611-2-13 Reactor O
No No No No No Yes Yes DH return line PR-611-2-21 Reactor 100 No No No No Yes Yes No MFW PR-638-13-5 Reactor 0
No No No Yes Yes No No MFW PR-638-13-6 Reactor 0
No No Yes No Yes No l
NFW PR-638-13-7 Reactor 0
No No Yes No Yes No MFW PR-638-13-8 Reactor 0
No No No No Yes Yes No g
MFW PR-638-13-9 Reactor 0
No No Yes No Yes No
}
MFW PR-638-13-14 Reactor 0
No No Yes No Yes No i
MFW PR-638-13-15 Reactor 0
No No Yes No Yes No
(
MFW PR-638-13-16 Reactor 0
No No Yes No Yes No f
MFW PR-638-13-17 Reactor O
No No Yes No Yes No MFW PR-638-13-18 Seactor O
No No No No Yes Yes No 0
NFW PR-638-13-19 Reactor 0
No No Yes No Yes No
{
MFW PR-638-13-20 Reactor 0
No No Yes No Yes No MFW PR-638-13-21 Reactor NA No No No No No Yes Yes l
MFW PR-639-13-2 Reactor 100 No No No No Yes Yes No MFW PR-639-13-16 Reactor 50 No No Yes No Yes No MFW PR-639-13-17 Reactor 50 No No No No Yes Yes No MFW PR-639-13-18 Reactor 30 No No No No Yes Yes No MFW PR-639-13-29 Reactor 50 No No Yes No Yes No MFW PR-639-13-35 Reactor 100 No Yes Yes No No lj HPI. Normal MU PR-604-1-15 Reactor 0
No Yes No No No Yes j
HPI. Normal MU PR-604-2-41 Reactor NA No Yes No No No Yes
}
l Letdown PR-603-3-2 Reactor 0
No No No No No Yes Yes j
Letdown PR-603-3-4 Reactor 0
No No No No Yes Yes No Letdown PR-603-3-6 Reactor 100 No No No No Yes Yes No Letdown PR-603-3-8 Reactor 100 No No No Yes Yes No l
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Bechtel Associates Professional Corporation 112218 Ii2562 MCAR 40 Interim Report 9 Page 3 Reportability This condition was reported by Consumers Power Company to the NRC as a potential 10 CFR 50.55(e) reportable condition on August 21, 1980.
Submitted by:
J.A." Clements Nuclear Systems Group Supervisor Approved by: M7 h
M E.M. Hughes Project Engineer Concurrence by.
/AA d K L. Loos Chief Nuclear Engineer
/
j Concurrence by:
.M E.H. Smi';h Engineering Manager Concurr nce by:
f [ M.A. Dietrich f
Project Quality Assurance Engineer JAC/DDK/lb(N) l 121604s/J
Attachment:
Status of Pipe Whip Restraints Af fected by MCAR 40, dated 4/15/83 l
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lus2eII 3ous23 STEe 03 100 03 S13# 03 1oD 03 NeePeP NeePeP
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HolP dqese I dutse I dqese II dqese II 813e 103
)IE gotponu dH-90E-E-6 Hee 0202 100 NO NO Nc Aes Aes go I
la2ponu dH-90E-E-IO Hee 0202 O
NO NO NO Aes Aes NO l
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legponu dE-90D-E-L Hee 0202 O
NO NO NO NO NO Aes Aes
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102ponu dH-909-E-6 Hee 0202 100 NO NO NO NO NO Aes Aes 3%0 1e2ponu dE-90D-E-IO Hee 3202 NV NO NO NO NO Aes Aes i
la2ponu dH-9OD-E-D3 Hee 0202 0
dC NO NO NO NO Aes Aes
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onas}po swc aouge}umeug 2
a VJM dH-9EE-D-D vnI O
NO NO NO NO les Aes No t
i VJM dE-9EE-S-I Ynu O
NO NO NO No Aes Aes NO
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VJM dH-9EE-5-ZV yna 0
Aes NO No NO NO Aes Aes VJM dH-9EC-S-E Wnu O
NO NO NO Aes Aes NO MO VJM dH-9EE-5-S Vnu 0
Aes NO NO NO Aes Aes NO VJM dH-9EE-5-9V ynI 100 NO NO No NO NO Aes Aes VJM dE-9CE-S-93 ynu 100 NO NO NO NO No Aes ies VJM dE-9EE-S-L Wna O
NO NO NO NO NO Aes ies VJM dH-9EE-5-6 VRX O
NO NO NO NO No Aes Aes
[
VJM dH-9EE-S-IZ vnI O
NO NO NO NO NO les Aes VJM dE-9EE-5-IS VnI O
NO NO NO NO No los Aes I
VJM dU-9ED-5-I Ynz O
NO NO NO NO NO Aes Aes VJM JH-9ED-S-Z vnI O
NO NO NO NO NO Aes ies g
VJM dE-9ED-S-E VnI O
NO NO NO No Aes Aes NO
, VJM dH-9CD-5-DE VnI O
NO NO NO No Aes Aes MO
(
VJM dH-9ED-5-10 vnu 100 NO NO NO NO NO Aes Aes WJM dH-9CD-9-ZV Vnu 100 NO NO NO NO NO Aes Aes VJM dE-9ED-9-C Vnu O
NO NO NO les Aes NO NO VJM dH-9ED-9-D Vnu 100 NO NO NO NO NO Aes Aes I,
VJM dH-9CD-9-A Vnu 100 NO NO NO NO MO Aes 103 VJM dE-9CD-9-0 Vnu 100 NO NO NO NO NO Aes Aes
.f Ne}u s2esu dE-9CI-Z-I Wnu NV Aes Aes NO MO 1
}
Ne}u sgaru dH-9EI-Z-Z Vnu MV Aes Aes NO NO p
Netu steem dH-9EI-Z-E vnI NV Aes ies NO NO XeTU steem dE-9EI-E-D An2q}uo DO Mo NO Aes Aes go we}u steem dE-9EI-Z-9 An2qluo DO NO NO Aes Aes NO wetu steem dE-9EI-Z-S 1n2qiuo DO NO NO Aes Aes NO l
l welu steem dE-9EI-t-I YnI 6S NO Aes Aes NO NO l
Netu steem dE-9EI-E-Z Wnu 65 NO Aes Aes NO NO wetu steem dE-9EI-E-E Wnu 65 NO Aes ies NO NO Nelu s2esu dE-9EI-E-D 1n2qluo O
NO NO Aes' 188 NO i
deSe Z 00EZn 0D/IS/SE
Pipe Whio Restraints Affected by MCAR 40 (continued)
I'3 i
N Restr Mod.
Mod.
cyy System Pipe (2)
Install Constr Size OK Loc OK Size OK Loc OK Needed Needed l
ID
_ Restraint Blde
(%)
Hold Phase I Phase I Phase II Phase II Size Loc Main steam PR-631-3-5 Turbine O
No No Yes Yes No Main steam PR-631-3-6 Turbine O
No No Yes Yes No Main steam PR-632-2-1 Aux 95 No Yes Yes No No p3 I
Main steam PR-632-2-2 Aux 95 No Yes Yes No No Main steam PR-632-2-3 Aux 95 No Yes Yes No No CJ' Main steam PR-632-2-4 Turbine 40 No Yes Yes No No C7)
Main steam PR-632-2-5 Turbine 40 No Yes Yes No No es)
Main steam PR-632-2-6 Turbine 40 No Yes Yes No No Main steam PR-632-2-7 Turbine 40 No Yes Yes No No 1
Main steam PR-632-2-8 Turbine O
No Yes Yes No No Main steam PR-632-2-9 Turbine O
No Yes Yes No No i
Main steam PR-632-3-1 Aux 95 No Yes Yes No No Main steam PR-632-3-2 Aux 95 No Yes Yes No No Main steam PR-632-3-3 Aux 95 No Yes Yes No No Main steam PR-632-3-4 Turbine O
No Yes Yes No No Main steam PR-632-3-5 Turbine O
No Yes Yes No No l
Main steam PR-632-3-6 Turbine O
No Yes Yes No No Main steam PR-632-3-7 Turbine O
No Yes Yes No No Main steam PR-632-3-8 Turbine O
No Yes Yes No No Main steam PR-632-3-9 Turbine O
No Yes Yes No No Main steam PR-632-3-10 Aux 90 No Yes Yes No No Main steam PR-660-1-1 Aux 90 No No Yes No Yes No Main steam PR-660-1-2 Aux 90 No No Yes No Yes No Main steam PR-660-1-3 Aux 90 No Yes Yes No No Main steam PR-660-1-4 Aux 90 No Yes Yes No No Main steam PR-660-1-5 Tunnels 0
No No No No No Yes Yes Main steam PR-660-1-6 Tunnels 0
No No Yes No Yes No Main steaa PR-660-1-7 Tunnels 0
No No Yes No Yes No Main steam PR-660-1-8 Tunnels O
No No No No No Yes Yes Main steam PR-660-1-9 Tunnels O
No No Yes No Yes No Main steam PR-660-1-10 Tunnels 0
No No No No No Yes Yes Main steam PR-660-1-11 Tunnels O
No No No No No Yes Yes Main steam PR-660-1-12 Tunnels O
No No Yes No Yes No Main steam PR-660-1-13 Aux 95 No No Yes No Yes No Main steam PR-660-1-14 Tunnels 0
No No No No No Yes Yes Main steam PR-660-1-15 Tunnels 0
No No No No No Yes Yes Letdown PR-603-15-1 Aux 0
No No No Yes Yes Letdown PR-603-15-4 Aux 0
No No No Yes Yes Letdown PR-603-15-5 Aux 0
No No No Yes Yes Letdown PR-604-15-1 Aux 0
No No No Yes Yes
[
Letdown PR-604-15-2 Aur 0
No No No Yes Yes d
4
[
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0032u 04/15/83 L
m Ploe Nhio Restraints Affected by MCAR 40 (continued)
I
.f Restr Mod.
Mod.
System Pipe (2)
Install Constr Size OK Loc OK Size OK Loc OK Needed Needed ID Restraint Bldo
(%)
Hold Phase I Phase I Phase II Phase II Size Loc N
Letdown PR-604-15-3 Aux 0
No No No Yes Yes Letdown PR-604-15-5 Aux 0
No No No Yes Yes
~
Letdown PR-604-15-7 Aux 0
No No No Yes Yes CO (1) Phase I is an energy balance analysis: Phase II is a time-history (dynamic) analysis (2) Total potentially affected pipe whip restraints = 116 N
LEGEND:
t 11 DH: Decay heat MFN: Main feedwater N
AFN: Auxiliary feedwa'er HPI: High-pressure injection NU: Wakeup AUK: Auxiliary NA: Not available Loc: Location Mod: Modification I
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