ML20217C458

BWR Owners Group Evaluation of NUREG-0737 Item II.K.3.24, HPCI & RCIC Sys Environ Capabilities

ML20217C458
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	06/30/1981
From:	Duncan J, Marriott P GENERAL ELECTRIC CO.
To:
Shared Package
ML20217C427	List: BVY-99-128, Submits Listed Addl Info in Support of 990414 Request for Clarification to SER Confirming Adequacy of Space Cooling for HPCI & RCIC Sys,Re Item II.K.3.24 of NUREG-0737.Copy of NEDE-24955,encl ML20217C458
References
RTR-NUREG-0737 NEDE-24955, NUDOCS 9910130264
Download: ML20217C458 (8)

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JUNE 1981 BWR OWNERS' GROUP EVALUATION OF NUREG-0737 ITEM ll.K.3.24:

HPCI AND RCIC SYSTEM ENVIRONMENTAL CAPABILITIES I

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' GENER AL $ ELECTRI' lu 188e: Pd88en P PDR

NEDE-24955 Class 11 June 1981 Bit OWNER 8' CROUP EVALUATION OF NUREG-0737 ITEN II.K.3.24 EPCI Am RCIC SYSTEN EB71303 ENTAL CAPASILITIES Approved:

J. D. Duncan,. Senior Program Manager TMI Prograss P

Approved ,

P. W. Marr ott, Manager BWR Operations Analysis NUCLE.M FUEL AND SERVICES DIVISION e GENSRAL ELECTRIC COtePANY SAN JOSE, CAUPORNIA SS126 SENERAL $ ELECTRIC

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NEDE-24955 FOREWORD This report was prepared by General Electric Company for the BWR Owners' Group as authorized at the Owners' Group July 1, 1980 general meeting. It is not I

intended to serve as a freestanding response to NUREG-0737 Requirement II.K.3.24; I rather it is a specialized contribution which is to be used by individual utilitie in preparing their own submittals.

This study is intended to assist the BWR Owners' Group in responding to NUREG-073' Requirement II.K.3.24, which states, "Long-term operation of.the reactor core isolation cooling (RCIC) and high pressure coolant injection (HPCI) systems may require space cooling to maintain the pump room temperatures within allowable limits. Licensees should verify the acceptability of the consequences of a ,

complete loss of alternating-current power. The RCIC and RPCI systems should be designed to withstand a complete loss of off-site alternating current power to their support systems, including coolers, for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />." l The NRC has subsequently clarified the phrase " complete loss of alternating current power" to mean loss of only off-site alternating current power. This clarification is doctamented in Appendix A. For most plants, satisfying this requirement involves a statement that all support systems necessary for HPCI and RCIC systems operation, including room coolers, are powered by on-site emergency power, and RCIC and RPCI can operate for 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> with loss of off-site AC power. For plants whose room coolers are not on emergency power, this NRC item can be satisfied by showing that these systems can operate for the 2-hour period without exceeding the equipment capabilities defined in this study.

This report is not intended to be used as a direct submittal to the NRC; it should be used only to assist individual utilities in responding to this task.

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NEDE-24955 INTRODUCTION Nis study presents the realistic equipment environmental capability for the HPCI and RCIC pumps, turbines, and turbine control components. The turbine control components are the limiting equipment with regard to env$ronmental capability. The following; information is applicable to HPCI an% RCIC systems using Terry steam turbines for the plants listed in Appendix B.

1 CONCLUSIONS The realistic equipment raos environmental limit for the HPCI and RCIC systems using Terry steam turbines and Woodward electronio control r/ stems is 1500F, and 100% relative humidity for the required M.our perici, l

If this environmental limit earnot be saintained in the e .tuipment rooms, consideration can be given to remoi,41y locating the electronio control panel.

' The equipment supplier has identified the acosptability of a remote location, up to 600 feet removed, using 16 gage, twisted, shielded wiring for interconnecting cabling. (It must be noted that the remote loostion of the electronio control panel complicates the control system calibration procedures 2 and increases the poter.tial for noise interference in the control systaa.) If l

the electronic control panel can be remotely located for an environmental condition not exceeding 1500F and 100$ relative humidity, system operation with the turt',ne/ pump equipment room reaching an environmental limit of 2120F and 100% relative humidity is possible for the required 24our period.

BA dsavumu INFORMATION AND DATA The following inforsution and data enlain and justify the conclusions defined above.

The design basis for the equipment i.s:

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NEDE-24955 Normal er.rironment, equipment not running - 1040F, 90% RH Normat environment, equipment running - 1500F, 90% M Abnormal environment, equipment running

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Turbine mounted equipment - 2120F for 0 ts 5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 1500F for 6 to 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> 1005 M Electronio controls, remote mounted - 1500F for 0-12 hours 1005 RH Woodward Governor Company, supplier of the turbine control components, has identified a maximum operating temperature of 1680F, with 80% reistive humidity for their electronic controls (any time interval) and 2120F with 1005 relative humidity for up to 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> operation for the control components which must be mounted on the turbine assembly.

t Typical turbine control systems have been subjected to thermal aging cnd accident environment conditions in specifio qualification tests in accord 6nce with IEEE-323. The electronio controls were "ageda ter 50 days at a temperature of 1850F in a non-operatiomi state, followed f operation in a temperature environment of 1500F, with 1005 relative humidity, for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. The remaining control components, which must remain mountad on the turbine, were " aged" for 50 days at a temperature of 2250F, followed by operation in an enviemt of 2120F,1005 RH for 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and 1500F,1005 RH for an additia. A 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

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• APPEND NRC CLARIFICATION SWR ommasTX onou, A: .__

P.O. Ses 1551 # Mey. North corohno 97ece * (919) a36 65a4 BWROG 811.4 January 23. 1981 l

l U. 5. Nuclear Regulatory Consission Division of Licensing l 4

Office of Nuclear Reactor Regulation l Washinimon. D. C. 20555 Attent<on: Darrell G. Eisenhut Director l

Subject:

Clarification of NUREG-0737 Items II.K.3.24 and II.K.3.25 Gentlemen: t This letter documents the telephone conversation between H. W. Sherwood and F. R. Hayes of General Electric and Wayne Hodges of the NRC on January 14 1981. The subject of the telephone conversation was clarification of NUREG- l 0737 Requirements II.K.3.24 and II.K.3.25.

The questiotu pertained to defining what was intended by " loss of alternsting-current power" as described in the two items. Item II.K.3.24 states. " Licensees i should verify the acceptability of the consequences of a complete loss of i alternating-current power" and item II.K.3.25 states. "The pump seals should be designed to withstand a complete loss of alternating-current (ac) power for at least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />." 4 Mr. Hodges indicated that loss of alternating-current power is intended to mean j only loss of offsite power for both items, and that failure of onsite emergency power does not have to be assumed. 4 If have any further questions. pivase contact R. H. Buchholz (GE).

(408 925-5722. . 4 Sincerely.  !

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,h b D. 8. Waters. Chairman 1 2 BWR Owners' Group 08W:na cc: M R Owners' Group M. W. Hodges (MR J. A. 01shinski C)

R.H.Suchholzq <

k. W. Marriott L h.J. Stark (GED .<

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NEDE-24955 APPENDIX B Participating Utilities HPCI/RCIC Environmental Capabilities

' This report applies to the following plants, whose Duners participated in the report'a development.

Boston Edison Pilgrim 1 Carolina Pcmer & Light Brunswick 1&2

? r z = 1th Edison LaSalle 1&2, Dresden 2 & 3, Quad Cities 1 & 2 Georgia Power Batch 142 '

Ious Electrio Light & Power Duane Arnold Niagara Mohawk Power Nine Mile Point 2 Nebruska Public Power District Cooper Northern States Power Monticello Ph!1adelphia Electric Peach Botton 2&3; Limerick 142 Detroit Edison Enrico Fermi 2 Mississippi Power & Light i Grand Gulf 1&2 Pennsylvania Power & Light Susquehanna 1&2 i

iisshington Public Power Supply System Hanford 2 Cleveland Electric Illuminating Perry 1&2 Houston Lighting & Power Allens Creek Illinois Power  ;

Clinton Station 1&2 Publio' Service of Oklahoma Black Fox 1&2 Tennessee Valley Authority l Browns Ferry 1-3, Hartsville 1-4; Phipps Bend 1-2 Power Authority of the State of New York Fitzpatrick Vermont Yankee Nuclear Power Vermont Yankee Gulf States Utilities River Bend 1 & E Public' Service Electric & Ges l Hope Creek 1 & 2 1

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. i NEDE-24955 DISTRIBUTION Name M/C W. R. Becraft 738 )

R. J. Bogisich/R. B. Hamilton 364

. R. J. Brandon/J. H. Oates/A. E. Rogers /L. H. Youngborg 889 R. M. Buchhols 682 D. W. Diefenderfer/F, P. Felini 880 {

.. C. W. Dillmann 1 750 i J. D. Duncan I 738 l

W. C. R1hoff 886 R. M. Fairfield 855 R. M. Felthous TTC L. F. Fidrych 167 J. S. Gay /J. J. Marguin 864 L. S. Cifford Bethesda F. R. Hayes 682  ;

R. A. Hill 682 I D. W. Books 277 P. W. Ianni 151 D. L. Janacek MTC J. C. Ralso 750 J. H. Rrepick 603 P. W. Marriott 848 R. F. McClelland (33) 681 W. C. Meinhardt 886 J. F. Schilder 848 M. W. Laerwood 848 l

F. F. Smith 580 S. J. Stark 682  :

B. Stevens (5 + 1) 126 I. F. Stuart 1 886 '

M. E. Tanner 855 T. Trocki 681

.C. A. VonDr.amt

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NEDE-24W33 DISTRIBUTION (Coat Name M/C D. E. W111ste 844 W. J. Ear 11a 843

. J. F. Eilinskas 843 {

NEBG Library (5) - 328 VNC Library (2) V01 l

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