ML19260B277
| ML19260B277 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 11/30/1979 |
| From: | Hood D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7912070511 | |
| Download: ML19260B277 (18) | |
Text
.
MEETING
SUMMARY
DISTRIBUTION Cocket File NRC PDR h[a1PDR NOV 3 01979 NRR Reading LWR #4 File H. Denton E. Case H. Berkow W. Russell D. Ross D. Vassallo S. Varga J. Stolz R. Baer
- 0. Parr L. Rubenstein C. Heltemes L. Crocker B. Kirschner F. Williams R. Mattson ro]
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o, UNITED STATES I
'h NUCLEAR REGULATORY COMMISSION C
WASHINGTON, D. C. 20555
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NOV 3 01979 Docket Nos:
50-329 and 50-330 APPLICANT: Consumers Power Company FACILITY:
Midland Plant, Units 1 & 2
SUBJECT:
SUMMARY
OF SEPTEFEER 6,1979 MEETING ON LOAD SEQUEt'CING AND DESIGN STANDARDS FOR DIESEL GENERATOR On September 6,1979, the NRC staff met in Bethesda, Maryland with Consumers Power Company and the Bechtel Corporation to discuss the Midland design which uses a single load sequencer for connecting nmergency safety feature loads to the emergency bases whether power is being supplied either from offsite or from the onsite diesel generator. The agenda also included use of standards by the Diesel Engine Manufacturers Association (DEMA) for design of the diesel engine and engine mounted appendages. Meeting attendees are listed in Enclosure 1.
The discussion of load sequencing was based upon the app'.icant's response in FSAR Revision 18 to staff question 040.112.
In this question, the staff requires that the design be revised to provide a separate sequencer for off-site and on-site power, or a detailed analysis to demonstrate that there are no credible sneak circuits or common failure modes in the sequencer design that could render both onsite and offsite power sources unavailable. The staff question also requires information concerning the reliability of the sequencer.
The applicant sumarized the revised reliability analysis which will be sub-mitted by FSAR Revision 24. The applicant also noted that the sequencer is equipped with continuous (about once per second) automatic testing with control room alarms upon detection of fai Hre.
The applicant felt that this auto-test feature precluded the need for sneak circuit analyses. The staff disagreed and eated that sneak circuit analyses were necessary to assure that certain failures (sneaks) can not adversely affect both sequencers.
The staff also noted that the FSAR presently provides insufficient information regarding the survivability of the plant without the availability of both onsite and of fsite a.c. power and referred the applicant to NUREG-0510, Appendix A, " Station Blackout." The staff further nated that the Midland Auxiliary Feedwater System design, which consists of one motor driven pump and one turbine driven pump for each of the two plants, fails to comply with position 85 of Branch Technical Position ASB 10-1.
The staff will be issuing additional requests and positions regarding these matters.
The applicant discussed the differences between ASME III requirements and DEfiA standards relative to the emergency diesel and its auxiliaries. The principle difference regards material traceability and the extent of non-destructive tests for the engine mounted components. The applicant provided correspondence from the ASME Code Comittee clarifying that an N-stamp is not 1515 2R
. NOV ;s' U,9 needed on the engine and engine-mounted components. The applicant also noted that all on and off components for Midland had been subject to the quality control program of the vendor, Diehler-Valve. The staff asked what material is used for the fuel lines and cooling water lines, and the applicant will respond later.
The staff review is continuing.
Viewgraphs used by the applicant are provided by Enclosure 2.
Y L-Darl S. Hood, Project Manager Lignt, viater Reactors Branch No. 4 Division of Project Management
Enclosures:
As stated cc:
See next page 1515 261
F.A '
/l Consumers Powr Company NOV 3 01979
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Michael I. Miller, Esq.
Mr. S. H. Howell l-Isham, Lincoln & Beale Vice President Suite 4200 Consumers Power Company J
One First National Plaza 212 W. Michigan Avenue j
Chicago, Illinois 60603 Jackson, Mich1gan 49201 Juilil L. Bacon, L',q.
Consur.ers Power Lompany 212 West Michigan Avenue Jackson, Michigan 49201 Mr. Paul A. Perry Secretary Consumers Powr Cor:pany 212 W. Michigan Avenue Jackson, Michigan 49201 Myron M. Cherry, Esq.
One IBM Plaza Chicago, Illinois 60611 Mary Sinclair 5711 Summerset Drive Midland, Michigan 48640 Frank J. Kelley, Esq.
Attorney General State of Michigan Environr.. ental Protection Division 720 Law Building Lansing, Michigan 48913 ft. Wendell Marshall Route 10 Midland, Michigan 48640 i
i Grant J. Merritt, Esq.
Thompson, Niel sen, K1 averkamp & James 4444 IDS Center 80 South Eighth Street Minneapolis, Minnesota 55402 i
Mr. Don van Farom, Chief Division of Radiological Health Department of Public Health P. O. Box 33035 Lansing, Michigan 43'JO9 1515 262
ENCLOSURE 1 ATTENDEES SEPTEMBER 6, 1979 Consumers Power Company Bechtel J. J. Zabritski W. A. Skelley G. E. Clyde J. G. Kovach M. J. Salerno M. R. Gross R. M. Hanm J. A. Pastor NRC
- 0. P. Chopra F. Rosa D. H. Beckham H. Balukjian R. Giardina A. R. Ungaro (Part-time)
W. Olmstead 4
D. Hood 1515 263
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SEQUEMCER DESIGN IMPLEMENTATION o
RELIABLE POWER SUPPLIES - CLASS lE 125 Vdc BATTERIES, BACKED-UP BY DIESEL GENERATOR THROUGH AC/DC BATTERY CHARGER o
SOLID STATE COMPONENTS (EXCEPT ACTUATION RELAYS) OF PROVEN RELIABILITY SEQUENCER RESPONDS TO ECCAS CONTACT OPENING (FAIL SAFE) o CEQUENCER OUTPUT RELAYS ARE ENERGIZED OR DE-ENERGIZED TO ACTUATE, AS REQUIRED o
SEQUENLEP HAS CONTINUOUS AUTO-TEST WITH CONTROL ROOM ALARMS
. o ON DETECTION OF FAILURE SEQUENCER COMPONENIS ARE MODULARIZED PROVIDING QUICK AND EASY o
MAINTENANCE OR REPLACEMENT d
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SEQUENCER DESIGN FEATURES THE SEQUENCER IS DESIGNED TO RESPOND TO:
o LOCA WITH OFFSITE POWER AVAILABLE LOCA WITH SIMULT?.NEOUS LOSS OF OFFSITE POWER o
LOCA FOLLOWED AT A LATER TIME BY LOSS OF OFFSITE POWER o
LOSS OF OFFSITE POWER FOLLOWED AT A LATER TIME BY A LOCA o
o LOSS OF OFFSITE POWER WITHOUT A LOCA ACCIDENT OTHER THAN LOCA WITH OFFSITE POWER AVAILABLE o
ACCIDENT OTHER THAN LOCA WITHOUT OFFSITE POWER AVAILABLE o
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LOAD SHEDDING IS PERFORMED ONLY ON BUS UNDERVOLTAGE CD r0 ACCIDENT SIGNALS FOLLOWING INITIAL SEQUENCER OPERATION CAUSE SEQUENCER RESET CN AND SEQUENTIAL STARTING OF ANY ADDITIONAL REQUIRED EQUIPMENT
I MIDUJ:D SEQUENCER A.
OPERATION OF Tile AUTO TEST PROVIDES CONTINUOUS COMPLETE SYSTD1 TEST APPROXIMATELY ONCE EACH SECOND.
DURING SURVEILLANCE OF SYSTEM'S CAPABILITY TO PERFORM ITS SAFETY FUNCTION.
EACH TEST CYCLE, SEQUENCER IS TESTED 4 TIMES - ONCE FOR EACH SENSOR CllANNEL.
B.
AIARM ON FAULT DETECTION -
AUTO TEST INPUTS ARE PULSES OF SUFFICIENT DURATION TO ACTIVATE CIRCUITS, BUT SUBSTANTIALLY LESS THAN NECESSARY TO CAUSE OUTPUT RELAY OPE OR TO SET INTERNAL MD!0 RIES. A DELAYED FAULT SIGNAL, IF NOT CLEARED BY A VALID SYSTDi RESPONSE, WILL CAUSE THE FAULT CONDITION TO BE ANNUNCIATED.
C.
SEQUENCER POWER SUPPLIES CLASS 1E 125 VDC IS SUPPLIED TO THE ACTUATION SUBSYSTEM CABINET THE SEQUENCERS, AND IS TRANSFORMED TO 12 VDC POWER SUPPLY TO THE SEQUENCER LCCIC FUNCTIONS, AND OUTPUT RELAY DRIVERS. CLASS lE 125 VDC FROM THE STATION BATTERIES, BACKED UP BY BATTERY CHARGERS POWERED BY DIESEL GENERAT D.
SEOUENCER RELIABILITY REF.:
PROPOSED SAR CHANGE NOTICE
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SUMMARY
COMPRISED OF HIGHLY RELIABLE, ALL SOLID STATE COMPONENTS SEQUENCER IS (EXCEPT OUTPUT RELAYS) AND IS CONTINUOUSLY MONITORED TO VERI ABILITY TO PERF0101 ITS SAFETY FUNCTIGN. ANY FAULTED CONDITION IS IMMEDIATELY ANNUNCIATEL.
T11EREFORE, USE OF A SINGLE SEQUENCER PER TRAIN WILL NOT REDUCE THE RELIABILITY OF THE SYSTD!; ALSO, USE OF TWO SEQUENCERS PER TRAIN DOES NOT IMPROVE Tile RELIABILITY OF THE SYSTEM.
1515 269
i MIDI.AMD DIESEL - ENGINE DESIGN STANDARDS I.
DDIA - Diesel Engine Manuf acturers Association The diesel engine and engine mounted appendages are designed to DEMA standards.
II.
IEEE Standard 387-1977 - Standard Criteria for Diesel-Ganerator Units Applied as Standby Power Supplies for Nuclear Power Generator Stations.
DEMA is listed in Section 4.1 of IEEE Standard 387-1977 as one of the standards to which the diesel-generator unit shall conform.
Other standards to which engine and engine mounted apper dages are qualified to include:
10 CFR 50 Appendix B ANSI N45.2.2 iEEE 126 IEEE 308 IEEE 323-1974 IEEE 344-1975 ASTM Standards ASME PTC 17 and PTC 26 III. NRC Regulatory Guide 1.9 (For Comment) - Selection, Design Quali-fication of Diesel-Generator Units Used as Onsite Electric Power Systems at Nuclear Power Plants.
"IEEE Standard 387-1977 deliniates principal design criteria and qualification testing requirements that, if followed, will help ensure that selected diesel-ge-units meet their per-formance and reliability requiremen Attachments Design Standard Cross Matrix from vendors quality assurance manual 1.
2.
Standards Listing in IEEE Standard 387-1977 3.
FSAR Table 3.2 Sheets 34 and 35 4.
FSAR Figure 9.5-31 5.
FSAR Tabic 3.9-17, Purchase Order M-18 Sheets 16 and 39 I
1315 270
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f IEEE IEEE STANDARD CRITEltIA FOR DIESEL GENER ATOR UNITS APPLH:D AS Std 3871977 dards and the latest revisions thereof, as of the 4.2 Conflicts. Where conflicts occur between date of approval of this document."
this standard and any refrience st.mlui!; h<ted
[1] ANSI C50.5-1955, llotating Exciters in Subsection 4.1, the pwvisions wt forth beer for Synchronous Machines.
in shall govern.
[2] ANSI C50.10-1977, Generalllequire-ments for Synchronous Machines.
[3] ANSI C50.12-19G5, Requirements for Salient Pole Synchronous Gener-j 1
ators and Condensers.
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[4] API Std G50, Welded Steel Tanks for
, Oil St orare.
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{~[5] l>lsM A, Standard l'ractm s for to
- 5. Principal Design Criteria d '.iedium Sr "I Stationary' Diesel;
, nnJ Ga<: Eni,in
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5.1 Capability.
5.1.1 Cencral. When in senice, each diesel-
[G]' IEEE'SGI 115-19G5, Test Procedures generator unit shall have the capability of per-for Synchronous Machines.
[7] IEl:E Std 308-1974, Standard Crite.
form:ng as a redundant unit of a standby Power supply, in accordance with the require-ria for Class IE Power Systems for ments stated in IEEE Std 308-1974 [7].
Nuclear Power Generating Stations.
5.1.2 Mechanical and Electrical Capabilities.
[8] IEEE Std 323-1974, Standard for The diesel-generator unit shall dso have each of 5
Qualifying Class IE Equipment for the fallowing specific capabilities:
Nuclear Power Generating Stations.
(1) Screice Environment. Operation in its service environment during and after any de-NOTE. The requirements for qu:dification stat.! in sign basis event, without support from the pre-IEEl: St d 367 1977, criteria for Dinel-Generatu Unu.
Applied as Standby Power Supplies for Nuclear Power fercad power supply.
Generating Stations, are beed on an interpretation of (2I StartinE and Loading. Starting' necel-IEEl: Std 3"31974, as applicable to these diesel gen-erating, t.nd being loaded with the design load, erator units.
within an acceptab'e time
[9] NEM A MG-1-1972, Motors and Gen-(a) from the normal standby condition (b) with no cooling availabic, for a time crators.
[10] NFPA No 37, Standard for the In-equivalent to that required to bring stallation and Use of Stationry the cooling equipment into service Combustion Engines and Gas Tur-with energy from the diesel-genera-bines.
tor unit
[11] TEM A, Standards of Tubular Ex.
, (c) on a restart with an initial engine changer Manufacturers' Association.
temperaturc equal to the continuous 112] IEE!! Std 344-1975, Recommended rating full-load engine temperature.
Practices for Seismic Qualification of (3) Light load or No Load Operation.
Class 1E Equipment for Nuclear Accepting design load following operation at Power Generating Stations.
lightload or no load for an acceptable time.
- (4) Design Load Profile. Carrying the de-sign load for an acceptable duration of time.
(5) Quality of Power. Maintaining voltage and frequency at the generator terminals with-in limits that will not degrade the performance 8Legend for Standards Organi.:ation:
of any of the loads comprising the design load ANSI
- American National Standards Institute v iM hm nyism% idudN API
- American I etroleum Institute the duration of transients caused by load ap-DI'M A - Diesel Engine Stanufacturers' Associati.n plication or load removal.
1EEE
- Institute of Electrical and Electronic's Engineers NI:MA - National Electncal Manufacturers' 5.2 Catings.
Association 5.2.1 Generai. The d esel-gei erator unit shall r$ tau have continuous and short tim, rati yr. which I$ 1 1 1 i et r shall reflect the output capabilit: -of the diesel-A.ssocia tion 1515 272 10
!!IDLAllD 1& 2-PG Al' T A E h!!._3 _2_- l__.( co n t i n u e d )_
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Ecicric Efit PJ:/_C o;? pone n_t, Section Location C rou:-
S t a nd a r.1 Catcaor t AUXILIAEY S YS'2 E!1S -
OT!! C I'. AUX 1LIARY SYSTUtis EI.Lergenev Dienel 9.5.4 l'u e l Oil Storaqe e nd "'r a nn f e r Ef620 Onergency diesel O
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oil storage t a ni:n 1:acrgency diecel G
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oi] day t a n): c tr.e rg c n c y' dincel O
C III-3 I
oil transfer pumpe 1>ipin; and valves Ovetflow cnd drain 0,C D
G31.1 1:A Other - !!on-engine mounted 0,G C
III-3 I
'D Other - Engine mounted C
11A DCl1A -
I Ellt.' r g e n cy Cienel 9.5.5 Generator Coolir.')
FP LS.r _0yELgg flotar driven G
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auxiliary cooling water punps Dienel generator G
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tlA C Eil A I
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1515 273
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(sheet 34)
Revinion 15 31/78
.'1IDLAliC 162-PSAR
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j Desi')n FSAlt Quality Code /
Se i s r.:i c Sy s t e ri/Cor.ponen t Section Location Group St anda rd Cateoorv pionel _ Cc nerator 9.5.6 E.t. itr ki_ng,p/qt e g Air receivers G
C III-3 I
G 11A NA NA Compresnors Air dryern G
NA NA NA l 15 Piping ano valves Air receiver to engine G
C III-3 I
Ct.nprecnor to receiver G
D D31.1 NA 15 Eng i ne raounted G
IJA DE!!A I'J Filters G
NA NA I
pienel Genorator 9.5.7 1,u b r i ca t,i_c >p SY3.h9R
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Tanks G
C III-3 I
/
Auxiliary lube oil G
C III-3 I
Engine drivon lube G
D DCliA I
oil puno St andby keepwarra G
C III-3 I
l 9 punp l'ip i ng and valves 1:ngine r::ounted G
NA DEMA I
l 15 Aux sk id r: lou n t ed G
C III-3 I
Dienel Generator 9.5.8 Co r ! e n t i on A,1,r
.. n..t.a k e. _.a n d I
1, X h a u s t Sy_nten Turbocharner G
NA Dell A f>
I Intake air louvers G
NA NA I
Intake filtern G
NA NA I
l 15 Ducts and dampers G
NA Sf1ACNA I
Intake and G
NA NA I
exhaust silencers
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TABTE 3.9;_H (continued),
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PIIASE I - EQUIPMENT QUALIFIED BY ANALYTICAL MODELING X( 11. ) Engine (lH) Starting air tank (lB) Generator (11) Auxiliary skid (lC) Intake filters (lJ) Starting air skid (1D) Exhaust silencer (lK) Standpipe 14 (lC) Intake silencer (IL) Jacket water and lube oil coolers (1F) Fuel oil drip tank p(1M) Starting Air Strainer (1G) Labe oil cuup tank (Engine Mounted) 23 K{lN) Starting Air Filter (Engine Mounted)
All equipnient in this category was qualified primarily using the ANSYS computer procram.
Three dimensional finite element models using distributed mass tratrices were amployed.
The model responses of the dominant modes were combined using the square root. of the sum of the. squares (SRSS) to yield the maximum renponse.
The models were generally developed using the fo] lowing ele:aent types:
beams, shells, springs, and (wher e enmponents contributed to the inertia concentrat ed ma: ucs but not sti f fness ).
Beam models with concentrated masses were developed for all items except the lube oil sump tank, the st.and pipe, and the inlet filter to determine overall modes and support forces.
For local strenses, detailed shell models of appropriate areas were used.
Due to the fluid levels, liquid weight was included totally as an impulsive weight.
The following criteria were established for seismic 34 qualification:
1.
Failure of any of the items except auxiliary skid and starting air skid determined by consideration of bolt and nominal shell stresses 2.
Failure of auxiliary skid and starting air skid determined by consideration of channel and bolt stresses (lA) Engine F.
The analytical techniques used for qualification of the diesel generator vere based on experimental tests conducted on the RV-16-4 and RV-20-4 model engines.
The testn involved exciting the engine with vibratory forces and ascertaining natural frequencies and mode shapes of engine structure and appendages.
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e (sheet 16)
Revi:;j on 23 7/79 1515 276
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TA.Bl.M 3.9-17 ( con t. i n u ed ),
PHASE 2 - APPE!!DAGE AND AUXILIARY ITEMS QUALII'IED BY SIIAKE TABLE TEST 1pG
.,Vi-(2A) Governor M. ((2C) Engine driven lube oil pump 2B) Overspeed governor with chutdown valving 2,.
3 (2D) Engine driven jacket wat.er pump Jg,-
(2H) Engine driven fuel oil booster pump
.N-(21') Turbocharger
.,'Q (2c;)
In'~
lo.
(! e1 t
.r'
(.:U) Ik o
g g'
.'rc (21) Solenoid operated air start valve (2J ) Check valve relat ed to air start redundancy (2K) Motor driven keepwarm oil pump (2L) Motor driven auxiliary lube oil pump (2M) Mot.or driven auxiliary jacket water pump (2N) Motor driven auxiliary fuel oil booster pump (20) Motor driven jacket water keepwarm pump 7 * ( 21') Lube oil strainer and filter M- (20) Fuel oil filter and strainer
( ),
(2R) Keepwarm oil fi ] Ler (2S) Starting air comprensor (2T) Start j nq air dryer (2U) Starting air aftercooler (2V) Lube oil keepwarm heater 23 (2W) Jacket water keepwarm heater Appendage: and auxiliary items listed above were, in general, quali fied by shake table tests.
In all ca ne., a tent. item was mounted to the shake table in a manner that approximat.ed as closely as possible the actual i n; erv..:o
, sunt. i ns; :ond i L; on.
This included using the actua]
size and type of mount i ng bol ts, mounting brackets, flanges, etc.
The tit.e-h] story of acceleration during low level tests and full scale tent: was measured by either a strain gage or servo 1.ype accel eromet er.
Where ponsible, actual oporating pressurea and 14 tempe ra tu re:. were simul a ted during testinc.,.
The type of motion used as input during these tests was mu]tifrequency, complex controllable at 1/3 octave in terv.il.
Thjn motion provided energy over the entire frequency ranqe of 1-40!L, and ensured tnat any resonances would be cxcited.
The miniuum exeitat. ion Line in each test was 30 second:..
Each test specimen war subjected to five OBE tests and one SSE test for each of' f ou r mount.i nq 01ientations.
A cont.rol accelerometer mounteti on the shake table wan used to meanute the moti.on du ri ng
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the t e. ; L.
This signal was stored in a minicomputer system wh3ch (sheet 39)3 Revision /
7/79 ictr
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