ML20070S217
| ML20070S217 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 01/30/1983 |
| 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, 20686, 80-04-#8, 80-4-#8, MCAR-40, NUDOCS 8302040307 | |
| Download: ML20070S217 (9) | |
Text
.
Consumers Power James W Cook 0 fhf Vice President - Projects, Engineering and Construction General Offices: 1945 West Parnell Road, J ahoon, MI 49201 * (517) 78& O453 January 30, 1983 80-04 #8 Mr J G Keppler, Regional Administrator
'US Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 MIDLAND PROJECT -
DOCKET NOS 50-329'AND 50-330 IIELBA RESTRAINT DESIGN FILE:
0.4.9.41 SERIAL: 20686
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 This letter, as were the referenced letters, is an interim 50.55(e) report concerning IIELBA restraint design. provides a current status of the actions being'taken with regard to this matter.
Another report, either interim of final, will be sent on or before May 6, 1983.
JWC/WRB/lj r
! : MCAR-40, Interim Report 8, "lligh-Energy Line Break Analysis (IIELBA) Pipe Whip Restraint Designs," dated January 4, 1983 CC: Document Contro' 'Jesk, NRC Washington, DC
(
RJCook, NRC Resident Inspector l
Midland Nuclear Plant FEB 21983 OC0183-0056A-MP01 l
8302040307 830130 M,)]
PLM ADOCK 05000329 PDR a
2 Serial 20686 80-04 #d CC: CBechhoefer, ASLB Panel RSDecker, ASLB Panel FPCowan, ASLP.anel 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 TNK8J GC0183-0056A-MP01
(
Serial 20686 80-04 #3 Bechtel Assoc. tes Professional Corporat. ion ia 099860 100046 Management Corrective Action Report (MCAR)
SUBJECT:
MCAR 40 (issued 8/26/80)
High-Energy Line Break Analysis (RELBA)
Pipe Whip Restraint Designs INTERIM REPORT:
8 DATE:
January 4, 1983 PROJECT:
Consumers Pov,er 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 7.
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 iorces rather than the transient peak thrust forces were used in the energy balance techniques for the design of HELBA pipe whip restraints.
Summary of Investigation All of the blowdown thrust force time histories have been determined l
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 i
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, i
Bechtel Associates ProfessionalCorporation 100046 9"'"6b MCAR 40 Interim Report 8 Page 2
,,4, Probable Cause The probable cause of this discrepancy has been identified as a misinterpretation of the requirements c" BN-TOP-2.
4 Corrective Action Corrective actions completed in the past are documented in previous interim reports.
Status of Restraint Reanalysis:
The attached table, originally included with Interim Report 2, shows the current status of restraints potentially affected by the concern of MCAR 40.
Entries lef t blank indicate incomplete analyses.
The initial population of restraints affected by MCAR 40 reported in Interim Report 2 was 325. Deletions due to pipe rerouting, shif ts in break locations, changes in analysis assumptions, etc., have reduced the number of affected restraints to 116. Of these 116 restraints:
a) Analysis has been completed on 107 restraints (92%), s!.owing 41 meeting design requirements. Based on a review of the blowdown time-histories, it is estimated that no more than two-thirds of the remaining 66 restraints determined to require modification do so because of the MCAR 40 problem. This. is about 8% of the total pipe whip restraints -in the plant.
(As discussed in Interim Report 2, the MCAR 40 reanalysis has been integrated into the normal HELBA production work and, as such, does not permit easy differentiation of the effects of MCAR 40 from the effects of other modifications.) The design drawings associated with these 66 restraints are being revised.
b) Analysis has been partially completed on an additional 3 restraints (3%) and all of these meet design requirements for the design concern 4
(size or location) examined.
c) Analysis is incomplete on the remaining 6 restraints (5%).
a The attached table will be updated again in the next report.
i
Bechtel Associates Professional Corporation 100046 c;99860 MCAR 40 Interim Report 8 Page 3 Reportability This cus:ition was reported by Consumers Power Company to the NRC as a potential 10 CFR 50.55(e) reportable condition on *.ugust 21, 1980.
Submitted by:,h N.
D.A. Clements Nuclear Systems Group Supervisor Approved by:
/h.#
E.M. Hughes
/
Ann Arbor Office Project Engineer Concurrence by:
Mak R.C. Loos Chief Nuclear Engineer a.
l Concurrence by:
[/.
b{
(,
l E.H. Smith
~ ' ~
I Engineering Manager Concurrence by:
g g Marion A. Dietrich J
Project Quality Assurance Engineer JAC/DDK/lb(N) 121604/J
Attachment:
Status of Pipe Whip Restraints Af fected by MCAR 40, dated 1/3/83
~_-
C)
MIDLAND UNITS 1 AND 2 C:3 C:3 STATUS OF PIPE WHIP RESTRAINTS AFFECTED BY MCAR 40(1) 43 C7)
Restr Mod.
Mod.
System PipeI2I Install Constr Size OK Loc.0K Size OK Loc OK Needed Needed ID Restraint Bldg
(%)
Hold Phase I Phase I Phase II Phase II Size Loc Inside Containment DH return line PR-610-2-6 Reactor 50 No No No OK OK No No E#3 DH return line PR-610-2-8 Reactor 50 No No No OK OK No No C C)
DH return line PR-610-2-10 Reactor 50 No No No OK OK No No to DH return line PR-610-2-12 Reactor 50 No No No OK OK Ho No cy)
DH return line PR-611-2-3 Reactor 100 No No No OK *
' OK No No DH return line PR-611-2-5 Reactor 100 No No No OK OK No No DH return line PR-611-2-9 Reactor 100 No No No OK OK No No DH return line PR-611-2-12 Reactor 0
No No No OK OK No No Du return line PR-611-2-13 Reactor 0
No No No OK OK No No i
DH return line PR-611-2-21 Reactor 100 No
'No No OK OK No No MFW PR-638-13-5 Reactor 0
No No No MFW PR-638-13-6 Reactor 0
No Fo OK No Yes No MFW PR-638-13-7 Reactor 0
No 03 OK No Yes No MFW PR-638-13-8 Reactor 0
No No No No OK Yes No MFW PR-638-13-9 Reactor 0
No No OK No Yes No l
4 MFW PR-638-13-14 Reactor 0
No No OK No Yes No MFW PR-638-13-15 Reactor 0
No No OK No Yes No 1
MFW PR-638-13-16 Reactor 0
No No OK No Yes No MFW PR-638-13-17 Reactor 0
No No OK No Yes No I
MFW PR-638-13-18 Reactor 0
No No No No OK Yes No MFW PR-G38-13-19 Reactor 0
No No OK No Yes No MFW PR-638-13-20 Reactor 0
No No OK No Yes No 1
MFW PR-638-13-21 Reactor NA No No No OK OK No No
~
i MFW PR-639-13-2 Reactor 100 No No No No OK Yes No MFW PR-639-13-16 Reactor 50 No No OK No 4
Yes No MFW PR-639-13-17 Reactor 50 No No No No OK Yes No HFW PR-639-13-18 Reactor 30 No No No -
No OK Yes No MFW PR-639-13-29 Reactor 50 No No OK No Yes No MFW PR-639-13-35 Reactor 100 No OK OK No No HPI, Aormal MU PR-604-1-15 Reactor 0
No OK No No No Yes UPI, Normal MU PR-604-2-41 Riactor NA No OK No No No Yes Letdown PR-603-3-2 Reactor 0
No No No No No Yes Yes Letdown PR-603-3-4 Reactor 0
No No No No Yes Yes No Letdown PR-603-3-6 Reactor 100 No No No Letdown PR-603-3-8 Reactor 100 No OK No No i.
Page 1 j
0644a 01/03/83
~
I g
C3 Pipe Whip Restraints Affected by MCAR 40 (continued)
C3 CD Restr Mod.
- Mod, System PipeI2)
Install Constr Size OK Loc OK Size OK Loc OK Needed Needed ID Restraint Bldo (t)
Hold Phase I Phase I Phase II Phase II S is.e Loc Letdown PR-603-3-9 Reactor 100 No OK No No i.
Letdown PR-603-3-10 Reactor 0
No OK No No J'
Co Letdown PR-604-3-7 Reactor 0
No No No No No Yes Yes Letdown PR-604-3-9 Reactor 100 No No No No No Yes Yes co Letdown PR-604-3-10 Reactor NA No No No No Yes Yes O
Letdown PR-604-3-48 Reactor 0
No No No No No Yes Yes C7) i Outside C
1 Containment AFW PR-633-4-4 Aux 0
No No No No OK
- es No AFW PR-633-5-1 Aux 0
No No No No OK Yes No AFW PR-633-5-2A Aux 0
Yes No No No No Yes Yes APW PR-633-5-3 Aux.
O No No No OK OK N.
No AFW PR-633-5-5 Aux 0
Yes No No No OK Yes No AFW PR-633-5-6A Aux 100 No No No No No Yes Yes 1
AFW PR-633-5-6B Aux 100 No No No No No Yes Yes AFW PR-633-5-7 Aux 0
No No No No No Yes Yes AFW PR-633-5-9 Aux 0
No No No No No Yes Yes AFW PR-633-5-12 Aux 0
No No No No No Yes Yes AFW PR-633-5-18 Aux 0
No No EO No No Yes Yes AFW PR-G34-5-1 Aux 0
No NC 20 No No Yes Yes AFW PR-634-5-2 Aux 0
No No No No No Yes Yes AFW PR-634-5-3 Aux 0
No No No No OK Yes No AFW PR-634-5-4B Aux 0
No No No No OK Yes No AFW PR-634-5-10 Aux 100 No No No No No Yes Yes AFW PR-634-6-2A Aux 100 No No No No No Yes Yes AFW PR-634-6-3 Aux 0
No No No OK OK No No AFW PR-634-6-4 Aux 100 No No No No No Yes Yes AFW PR-634-6-7 Aux 100 No No No No No Yes Yes AFW PR-634-6-8 Aux 100 No No No No No Yes Yes Main steam PR-631-2-1 Aux NA OK OK No No i
Main steam PR-631-2-2 Aux NA OK OK No No Main steam PR-631-2-3 Aux NA OK OK No No Main steam PR-631-2-4 Turbine 40 No Main steam PR-631-2-5 Turbine 40 No Mair. steam PR-631-2-6 Turbine 40 No No OK Yes No Main steam PR-631-3-1 Aux 95 No OK OK No No Main steam PR-631-3-2 Aux 95 No OK OK No No Main steam PR-631-3-3 Aux 95 No OK OK No No Main steam PR-631-3-4 Turbine O
No 0644a Page 2 01/03/83
Pipa Whip Rtatraints Affected by MCAR 40 (continued)
CD Restr C)
System PipeI2)
Mod.
Mod
- Install Constr Size OK Loc OK Size OK Loc OK Needed Needed C)
ID
_ Restraint Bldg (t)
Hold Phase I Phase I Phase II Phase II Size
_ Loc d#'
Main steam PR-631-3-5 Turbine O
No CT)
Main steam PR-631-3-6 Turbine O
No No OK Yes No Main steam PR-632-2-1 Aux 95 No OK OK No No Main steam PR-632-2-2 Aux 95 No Main steam PR-632-2-3 Aux 95 No OK OK No No Main steam PR-632-2-4 Turbine 40 No OK OK No N-Co OK OK No Nc CC)
Main steam PR-632-2-5 Turbine 40 No OK OK No No cr>
Main steam PR-632-2-6 Turbine 40 No Main steam PR-632-2-7 Turbine 40 No OK OK No No C7)
Main steem PR-632-2-8 Turbine O
No OK OK No No Main steam PR-632-2-9 Turbine O
No OK OK No No EU OK OK No No Main steam PR-632-3-1 Aux 95 NC OK OK No No Main steam PR-632-3-2 Aux 95 No OK OK Ho No Main steam PR-632-3-3 Aux 95 No 1
Main steam PR-632-3-4 Turbine O
No OK OK No No OK OK No No Main steam PR-632-3-5 Turbine O
No OK OK No No Main steam PR-632-3-6 Turbine O
No l
OK OK No No Main sicam PR-632-3-7 Turbine O
No Main steam PR-632-3-8 Turbine O
No OK OK No No OK OK No No Main steam PR-632-3-9 Turbine 0
No OK OK No No Main steam PR-632-3-10 Aux 90 No OK OK No No Main steam PR-660-1-1 Aux 90 No No OK No Main steam PR-6C3-1-2 Aux 90 No No OK No Yes No Yes No Main steam PR-6LO-1-3 Aux 90 No OK OK No No Main steam PR-660-1-4 Aux 90 No OE OK 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 OK No Yes No Main steam PR-660-1-7 Tunneit 0
No No OK No Main steam PR-660-1-8 Tunnels 0
No No No No No Yes Yes Yes No Main steam PR-660-1-9 Tunnels 0
No No OK No Main steam PR-660-1-10 Tunnels 0
NO No No No No Yes Yes Yes No Main Pteam PR-660-1-ll Tunnels 0
No' No No No No Yes Yes Main 6;eam PR-660-1-12 Tur.nels 0
No No OK
' No Main steam PR-660-1-13 Aux 95 No No OK No Yes No Main steam PR-660-1-14 Tunnels 0
No No No No No Yes Yes Yes No Main steam PR-660-1-15 Tunnels 0
No No No No No Yes Yes i
Letdown PR-603-15-1 Aux 0
No No No Letdown PR-603-IS -4 Aux 0
No No No Yes Yes Letdown PR-603-15-5 Aux 0
No No No Yes Yes Yes Yes Letdown PR-604-15-1 Aux 0
No No No Letdown PR-604-15-2 Aux 0
No No No Yes Yes Yes Yes 0644a Page 3 01/03/83
Pips Whip Rt2traints Affected by MCAR 40 (continued)
C:)
C)
Restr Mod.
Modar System Pipe (2)
Install Constr size OK Loc OK Size OK Loc OK Needed Neeqgg ID Restraint Bldg (t)
Hold Phase I Phase I Phase II Phase II Size Loc Letdown PR-604-15-3 Aux 0
No No No Yes Ye3 Letdown PR-604-15-5 Aux 0
No No No Yes Yes
]
Letdown PR-604-15-7 Aux 0
No No No Yes Yes (1) Phase I is an energy balance analysis; Phase II is a time history (dynamic) analysis 4
C' (2) Total potentially affected pipe whip restraints = 116 CC)
LEGEND:
CD 00 DH: Decay heat C7) j MFW: Main feedwater CE)
AFW: Auxiliary feedwater i
HPI: High-pressure injection MU: Makeup AUX: Auxiliary NA: Not available 4
i l
I 4
1 1
l
- ~.,
I f
1 t
1 06444 Page 4 01/03/03