ML20004E034
| ML20004E034 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 06/03/1981 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20004E035 | List: |
| References | |
| NUDOCS 8106110017 | |
| Download: ML20004E034 (19) | |
Text
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NUCLEAR REGULATORY COMMISSION
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WASHING TON, D. C. 20555 k~#
JUN 3 1981
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Docket Nos: 50-329 J
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JUti 011981* A APPLICANT:
Consumers Power Company G; um-m p COM4115 pC41 j
FACILITY:
Midland Plant, Units 1 & 2 g
SUBJECT:
SUMMARY
OF APRIL 30, 1981 MEETING TO REV lC L:I FEEDWATER SYSTEM DESIGN On April 30, 1931, the NRC staff and its Sandia consultant met in Ann Arbor, Michigan with Consumers Power Company (the Applicant); Bechtel; Babcock and Wilcox (B&W); and Pickard, Lowe and Garrick, Inc. Attendees are listed in.
The propose of the meeting was to review the design of the Midland Auxiliary Feedwater System (AFWS). A site tour to observe the system was conducted on April 28, 1981.
The meeting consisted of a review of the written presentation, " Auxiliary Feedwater Design Review," which was submitted by the Applicants letter of April 24,1981. The table of contents of that submittal provided the agenda for the meeting and is attached (Enclosure 2). The submittal also includes as Appendix A a synopsis (Report PLG-0166 dated March,1981) of the relia-bility analysis of the Midland AFWS, for which the full report (PLG-0147 dated October,1980) was fomarded by the Applicant's letter of February 23, 1981. For details of the meeting, see these documents.
Selected illustra-tions from these documents are reprinted (Enclosure 3).
Several action items were identified during the meeting:
l 1
At least one AFWS flow train should be capable of being operated l
independently of AC power for at least two hours.
In the event l
of a complete loss of AC the AFW turbine driven pump room roolers l
will not be available. Consumers Power committed to provide the results of a study to demonstrate that the AFW turbine driven pump l
and argy associated equipment in the turbine driven pump room will operete and remain operable for two hours without coom cooling.
2.
A transfer of the normal suction of the AFWS to the Service Water System is automatic upon coincident AFW Actuatior ',1gnal and low i
j suction pressure.
If the AFWS is manually initic.ed and the normal
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(non-seismic, non-tornado) water source is lost, operator action would be required to effect a transfer. Consumers Power should investigate the advisability of installing an automatic low suction pressure pump trip to provide pump protection. This concern must be addressed to evaluate Reconnendation GL-4, paragraph 10A.3.3 of FSAR Appendix 10A.
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. 3.
Consumers Power should revise FSAR section 9.3.3, Equipment and Floor Drainage System, to include a description and location of the controls for the drain isolation valves for the Engineered Safety Features and AFWS equipment rooms.
4.
Consumers Power should investis'te the effects of the seismic anchor being located downstream of the check valve on the suction line to the condenser hotwell. Consumers Power should discuss the reason for the present location of the seismic anchor and the merits of relocating it upstream of the check valve.
5.
The Midland design includes AC solenoid control valves in the pemp recirculation lines. Since these valves fail closed on loss of con-trol power, Consumers Power should determine whether there are con-ditions in a complete loss of AC event that could result in the AFWS turbine driven pump flow falling below the manufacturer's required pump flow.
6.
On April 24, 1980, a generic letter with short term and long term AFWS recommendations was issued to applicants with Babcock and Wilcox NSSS. Subsequently, Additional Short Term Recommendation 2 on pump endurance testing was revised from 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />. Test data requirements were added to the 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> endurance test guidelines.
Consumers Power should commit to conducting pump endurance tests per the revised recommendation and providing the data requested in the revised recommendation.
7.
Recommendation GS-4 states that emergency procedures for transferring to alternate sources of AFW supply should be available to the plant operators. Consumers Power should indicate that procedures will be available for the case in which the primary water supply is being depleted. The procedures should be consistent with the criteria in G S-4.
8.
Recommendation GS-6 specifies that f'(w path availability for an AFWS-flow train that has been out of server,e to perform periodic testing or maintenance should be confirmed. Consumers Power should state that there will be procedures or a technical specification require-ment for' independent backup verification of proper valve alignment.
Consumers Power should also indicate that technical specifications will be proposed to assure that prior to plant startup following an extended cold shutdown, a flow test will be performed to verify a flow path from the Condensate Storage Tank to the steam generators.
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4 9.
Additional Short Term Recommendation 1 discussed the level indication and alarm provisions needed for the primary water sources. Consumers Power should describe how its design meets these provisions.
- 10. Additional Short T&a acommendation 4 discusses procedures to be fol-lowed in plants which require local manual realignment of valves to conduct periodic tests on one AFWS train and which have only one remaining AFW train available for operation. The Consumers Power response only discussed provisions for operator communication
.a the control room. Consumers Power should commit to following the operator procedures discussed in this recommendation.
- 11. Consumers Power should review the AFWS normally open manual valves from a reliability view point to determine the need for administra-tive controls.
gerj]40 /
2' Licensing Branch No. 4 Division of Licensing
Enclosures:
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As stated i
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w Mr. J.' W. Cook Vice President Consumers Power Company 1945 West Parnall Road Jackson, Michigan 49201
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cc:
Michael I. Miller, Esq.
Mr. Don van Farewe, Chief Ronald G. Zamarin, Esq.
Division of Radiological Health Alan S. Farnell, Esq.
Dept,rtment of Public Health Isham, Lincoln & Beale P.O. Box 33035 Suite 4200 Lansing, Michigan 48909 1 First National Plazr.
Chicago, Illinois 60603 Janes E. Brunner, Esq.
William J. Scanlon, Esq.
Consumers Power Company 2034 Pauline Boulevard 212 West Michigan Avenue Ann Arbor, Michigan 48103 Jackson, !N -hican 49201 U. S. Nuclear Regulatory Commission a
Esc Resident Inspectors Office Myron M. L 1 IEM Plaza Route 7 Chicago, Illinois 60611 Midland, Michigan 48640 Ms. Mary Sinclair Ms. Barbara Stamiris 5711 Summerset Drive 5795 N. River Midland, Michigan 48640 freeland, Michigan 48623 Frank J. Kelley, Esq.
Atterney General State of Michigan Environmental Protection Division 720 Law Building Lansing, Michigan 48913 Mr. Wendell Marshall Route 10 Midland, Michigan 48640 Mr. Steve Gadler 2120 Carter Avenue St. Paul, Minnesota 65108 D
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l ENCLOSURE 1 ATTENDEES AFW Presentation 4/30/81 0- D. Parr NRC/DSI/ASB E. J. Sullivan, Jr.
NRC/DSI/ASB B. J. Roscoe SNL/DIV 4412 Darl S. Hood NRC/D0L Raj Anand NRC/NRR Dennis C. Bley Pickard, Lowe & Garrick Dennis Budzik CPC0 Licensing Blair Fairbrother B&W/Systens Engineering Cesar P. Ansoldo Bechtel/ Mechanical Group - Midland Project Gusharan Singh Bechtel/ Control Systens Ashok K. Katyal Bechtel/ Control Systens T. G. Ballweg Bechtel/ Mechanical Group R. A. Polick CPC0/ Mech / Nuclear - Design Productions P. E. Papaisannou CPC0 - Safety Analysis R. M. Hamm CPC0 - Safety & Licensing T. J. Sullivan CPC0 - Safety & Licensing L. S. Gibson CPC0 - Safety & Licensing J. G. Kovach Bechtel/ Electrical K. C. Prasad Bechtel/ Nuclear Staff B. P. Burdick Bechtel/ Licensing & Safety D. F. Lewis Bechtel/ Licensing & Safety D. W. Stillwell Pickard, Lowe & Garrick Inc.
J. P. Kindinger CPC0 - Safety & Licensing F. J. Levandesk B&W/ Project Mgt.
R. G. Griese B&W - Systens Engineering S. W. Emerson Bechtel/ Mechanical Group J. D. Agar B&W - Project Engineering R. W. Huston CPC0 - Licensing B. L. Harshe CPC0 - Safety & Licensing T. A. Klompstra CPC0 - Safety & Licensing John Wahl Bechtel - Safety & Licensing
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'?XII,IAKi fad.GTER SYS'n24 g / e/ 2 LESIGC REVIFA FRESD77ATION P00R ORIGINAL
-- 2 TAllLE CF 'O M D?rS Page 1.0 INr?oDrrION 1-1 1.1 FJRPOSE OF PESS?IATION 1-1 1.2 PRESD? RATION FOR4AT l-1 1.3 INriODUCT105 CF SPFAKERS 1-1
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2.0 IESIGN PASES 2-1 2.1 SLW DESIGS PASSS 2-1 2.2 PGE.R GO-F1TICf
"? SIGN P>SES 2-2 2.3 CODES AND STdQuas 2-2 3.0 SYSTE4 DESIGC AND OPERATION 3-1 3.1 AFW SUPPLY PIPI!G AND S.CTION SDURCES 3-1 3.2 AFW Pm PS 3-2 3.3 AFW DISCHUGE PIPI!G 3-3 3.4 OPERATI!G MD:ES 3-4 3.5 AFW AC M TION 3-5 3.6 POE.R SUPPLY 3-6 3.7 I!sTiuZNIATION AND CONIRDLS 3-8 4.0 STFR4 GENEPATG CDNIROL/SYSTB4 RESPO!SE 4-1 l
4.1 STEAM ERATG IEVEL ODNTROL 4-1 4.2 FEMNLY-GOOD GENERATG INTERUDCK 4-5 4.3 STIAM GCEPATG O/ERFILL IGOrrTIION 4-6 i
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6.1 S.'ECIY Et"nIJATION 6-1 6.2 GENEPE Dt: SIGN C;tlTERIA 6-3 6.3 RmlulmY GUID S 6-5 6.4 BR7dal Tr.DiNICAL ICSITIGS 6-7 6.5 "' G1 REGLM1GY GUID'dCE 6-8 LIST CF ABNVIATIGS POOR ORIGINAL FIGURES APPENDIX A:
MIDIAND P!RTT IJW SYSTD4 RELIABILITY A' E YSIS SYNOPSIS AP M IX B:
FSAR APP 10A APrTOIX C:
TrniNICAL SPF.CIFICATION 16.3/4.7.1.2 APPENDIX D:
NUREIM)667 RESPOISES, R1'X10ZhTATIO:S 9,10, 21 APIENDIX E:
ESAR CUES
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