ML20126K901

Forwards Request for Addl Info Re Auxiliary Sys.Questions Stem from Review of Amend 20 to Fsar,As Part of Review Process for Application for Ol.Prompt Response Essential for Closure of Open Sser Issues

ML20126K901
Person / Time
Site:	River Bend
Issue date:	07/12/1985
From:	Butler W Office of Nuclear Reactor Regulation
To:	William Cahill GULF STATES UTILITIES CO.
References
NUDOCS 8507300511
Download: ML20126K901 (7)

Text

.

Docket flo. 50-458 JUL 121985 ftr. William J. Cahill, Jr.

Senior Vice President River Bend fluclear Group Gulf States Utilities Con:pany Post Office box 2951 Beaumont, Texas 77704 Attention tir. J. E. Booker

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION As a part of the NRC staff's review of your application for an operating license for River Bend Station, the staff has determined the need for additional information in the area of auxiliary systems. This request for information is provided in the enclosure as eleven questions numbered 410.01-to 410-11.

The majority of these questions are the result of staff review of Amendment #20 to the River Bend FSAR. Your pronpt response to this request is essential for closure of open SER issues.

Please infom flRC Project Manager Stephen Stern, of your schedule for response and for clarification or further discussion on this topic.

Sincerely, llalter R. Butler, Chief Licensing Branch No. 2 Division of Licensing

Enclosure:

As stated cc: w/ enclosure See next page Distribution

> Dochpt TlTe~ NRC PDR Local PDR PRC Systen liSIC LB#2 Reading EHylton SSt(' n JPartlow BGrires Edordan OELD Dewey ACRS(16) UUilson JRidgely L DL/ Pit LBil2/DL/BC DSI S n:nk 1.' Butler / OParr 7/li/85 7/ p /85 L 7/lt/85 8507300511 850712

{DR ADOCK 050004L8 PDR

• ga rtyg g Iog UNITED STATES

,y ' g NUCLEAR REGULATORY COMMISSION O -p WASHINGTON, D. C. 20555

't,..... p, ,

Docket No. 50-458 Mr. William J. Cahill, Jr.

Senior Vice President River Bend Nuclear Group Gulf States Utilities Company Post Office Box 2951 Beaumont, Texas 77704 Attention Mr. J. E. Becker

SUBJECT:

REQUEST FOR ADDITI0f;AL It!F0PMATION As a part of the t:RC staff's review of your application for an operating license for River Bend Station, the staff has determined the need for additional information in the area of auxiliary systems. This request for information is provided in the enclosure as eleven questions numbered 410.01-to 410-11.

The majority of these questions are the result of staff review of Anendment s20 to the River Bend FSAR. Your prompt response to this request is essential for closure of open SER issues.

Please inform NRC Project 11anager Stephen Stern, of your schedule for response and for clarification or further discussion on this topic.

Sir.ce rely, Walter R. Butler, Chief Licensing Branch ho. 2 Division of Licensing

Enclosure:

As stated cc: w/ enclosure ,

See next page l

l l

i

Hr. Willian J. Cehill, Jr.

Gulf States Utilities Con.pany River Bend Nuclear Plant cc: Ms. Linda B. Watkins/Mr. Steven Irving Troy B. Conner, Jr. , Esq.

Conner and Wetterhahn Attorney at Law 1747 Pennsylvania Avenue, hW 355 Napoleon Street Washington, D.C. 20006 Batcn Rcuse, Louisiana 70802 Mr. William J. Reed, Jr. Mr. David Zaloudek Director - Nuclear Licensing Nuclear Energy Division Gulf States Utilities Company Louisiana Departoent of P. O. Box 2951 Environmental Quality Beaunont, Texas 77704 P. O. Box 14690 Baton Rouge, Louisiana 70898 Richard M. Troy, Ur., Etq.

Assistant Attorney General in Charge Mr. J. David hcheill, III State of Lcuisiana Department of Justice William G. Davis, Esq.

234 Loyola Avenue Department of Justice New Orleans, Louisiana 70112 Attorney General's Office 7434 Perkins Road Baton Rouge, Louisiana 70808 Resident inspector P. 0. Box 1051 St. Francisville, Louisiana 70775 H. Anne Plettinger 3456 Villa Rose Drive Gretchen R. Rothschild Baton Rouge, Lousiana 70806 Louisianians for Safe Energy, Inc.

1659 Glenmore Avenue Baton Rouge, Louisiana 70775 Jar.es W. Pierce, Jr. , Esq.

P. O. Box 23571 Baten Rouge, Louisiana 70893 Regional Administrator, kegion IV

,U.S. Nuclear Regulatory Commission Office of Executive Director for Operations 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011

, -- ,r.

AUXILIARY SYSTEMS BRANCH

. REQUEST FOR ADDITIONAL INFORMATION RIVER BEND STATION 410.01 In Amendment 20, you stated that you were providing a hypo-(9,2.5) chlorite feeding system in the ultimate heat _ sink (UHS).

This system recirculates the water in the UHS within each compartment. of the basin in order to control the organic growth. By Amcodment 16 you proposed to have manual initia-tion of the UHS fans inorder to reduce to loads on the TDI diesel generators. As part of the justification for manual intiation. of tha -f a n s , you provided the results of an analytic con =crning the heat up of the basin water without. the fans and without short-circuiting of the hot water back to the pump suction. Your analysis assuracd that the water in the basin was stratified and that thcro wbul d be no. mining of the heated water to disrupt the stratification. Provide the results of a revised basin water temperature and chcrt circuiting analysis with

consideration being givcn to the mixing frcm the hypcchler-ite syctem.

410.02 Specify the total residual chlorine level to be maintain:d (9.2.5) in the UHS basin and the frequency of the water analysis

to determine that the water is maintained at this level.

l Provido a P&ID FSAR Figure which shows this syGtem and it cmponents. Vcrify that failure of none of the ccmpcn-I ents of the hypochloite feeding system which,_are insido l the UHS as the result of a safe shutdown earthquake will l adversely offect the standby service water system.

l~

410.03 In accordance with Regulatory Guide 1.27 Position C.2.d, (9.2.5) provide a discuccion of plant shutdown and cooldown resull-l ing from a loss of oftcite power with a single failure j- of the UHS. In addition, the follcwing two different failure scenarios shculd be discussed: 1) where the failure maximicos y the ficcding in the pipe tunnel and 2) where the flooding l maximites the flooding of the site. Verify that no nefuty paramotors ar e encceded.

410.04 The standby service water cystem ( SSL-JS ) returns the hcated (7.2.5) water to the UHS for couling. Ona lucp of the returning l

(9.2.7) ' water is returned to the north and south sides of the t:HS while the other locp returns the water to the east sv.d west cides of the UHS. Prior to powering the "C" SSWS pump from the Division III diosal ganarator, the fan cclls which were- powered from the Di vi si on I diesel geacrator provided the cooling'for the water that was being returned

, by the Division I powered ESWS pumps. Si mi l i ar l y the Diwi-r 1

{

sion II fan cells provided cooling for the water provided by the Division II SSWS pumps. There is a cross connect between the discharge of the SSWS pumps in the two leaps such that the Division I powered SSWS pumps could cool the Division II equipment, in lieu of the Divicion I equip-mont, and return the water to the Division II pawared fan cells. With the powering at the C SSUS pump from the Divi-sion III diocol generator, the potential exists for anc loop of SSWS pumps to be inoperative w:th the cppcsite locp's fan cells inoperative. In this config. ration there wculd theoretically be sufficient SSWS and UHS capacity to remove 100% of the required heat but in ?"tuality the SSWS water would not be adequately cooled and could result in higher UHS basin water temperaturcs than have previously been evaluated. For this condition, prepare a proceedure to align the operable SSWS to the loop with the aperable -

UHS fan cells.

410.05 S.y Amendment 20 you provided the missing FSAR Table 9.3-4 (9.3.1) which identifies the " maximum allowable particle sico" with particle sizes ranging from 5 microns to 175 microns.

The FSAR commits to providing an air quality which has a maximum particle size of 3 microns. Previde clarificaticn as to the purpece of this table and verify your com:ai t men t to maintaining the maximum particle cire for the compressed air systems at 3 microns. _The tablo also identifies the

" scram discharge volume tanks" as requiring air with a manimum particle 21:e of 5 microns. What is a " scram dis-charge volume tank"? U!iy does a tank necd 5 micron qual i t y compressed air?

410.06 By Amendment 20 you provided a new water system entitled (9.3.7) the " suppression pool pumpback systom" (SFPS). Thic system is shown, in part, on FSAR Figure 9.3-7p which rcicrences Figure 9.3-7I which does not exist. Provido FSAR Figurc 9.3-71. This figure alco refers to FSAR Figura 6.3-1 wittout any grid cccedinates and Figure 6.3-1 docs not reference Figure 9.3-7p. Provide the grid cccrdinates cn Figur2 9.3-7p and revise Figure 6.3-1 to shcu the ccnnection to the SPPS. Referring to Figuro 9.3-7p, the lino Dcginning in grid cccrdinutes D-12 has neithcr a connection te ancthcr line nor a retcrence to another drawing. Submit a revised figure which identifies where this lino goes. Verify that valve AJV-144 is a fail clcscd valve or verify that thi s

. valva h as a scismic Catogcry I air supply which i s Class 15 powcred. Again refering to Figure 9.3-7p, verify 1) that valve V-182 :s drawn correctly and provide a discuscien of the water flow path from sump DFR-TR5B to the suppression pool and 2) verify that the piping safety class chango is correctly shown on the proper side of the .alvo and provide a discussion of the means used to provide redundcnt 2

, _ m . . _ . _ _ _ . - . . _ _ _ -. _ . _ _ . . _ _ _

l^

I seismic Category I isolation valvos'to isolate the suppres-l sion pool in the event of an earthquake.

410.07 By Amendment 20 you identified a new system, the SPPS,

! (9.3.7) to provide.a means of removing water from ECCS piping areas.

in the . event of a pipe failure and returning the water l to the_ suppression pool. On the FSAR figures which have identified for this system, no ECCS equipment has been been identified which would provide water to the SPPS.

Either identify the appropriate systems or provide a revis-ed Section 9.3.7.

410.08 By Amendment 20 you deleted the automatic initiation feature (9.4.5) of the diesel ventilation system and the' associated' alarms in the control room. The ventilation system is now started only by a temperature sensor. Considering the maximum

• l l instrumentation drift in the high temperaturo direction, specify the maximum ambient temperature and verify that ,

th i.s temperature is less than the equipment qualification temperature. Assume the failure of the circuitry to operate the ventilation syctem and prcvide 1) the timo until the diesel- generator fails, 2) the time available fcr repairs L to be made to prevent diesel failure, and 3) the manimum temperature in the room and verification that this tempora-ture will not have any adverce effect on the operation or life of the diesel generator. Since the same procedure will be used for all of the diesel generators and potentiall y the same people may be performing the maintainance on this equipment, all diesels chould be considered to have Lho same problem concurrently with the initiating event be:ng a LOCA with the reculting lacs of of f si te power- wi th the highest ambient temperature. Since the three diesels could potentially failure at the same time, either 1) cpecify the minimum personnel required to repair the diesel ventila-tion systems concurrently and provide a commitment to maintain this minimum staff level at all times, or 2) specify the order inwhich the diesel ventilation systems will be repaired, provide justification for the order of repair, specify the manimum temperature for each dicscl, and for each diccel whose temperature enceeds the qualification temperature, include that diesel's failure and resulting loss of equipment to the accident scenario and verify that no safety limits are excocded for the duration of the accident.

410.09 By Amendment 20 you has identified cight new ventilaticn (7.4.7) systems. Of these eight new systems, no information has l been provided .concerning the circulating water pump hcuse, l the cooling tcwer switchgear house, the ' clarifier area

switchgcar house and the blowdown pit with respect to tho l . physical location of- these buildings and equipment laycut i within the buildings. Provide FSAR figures which show l this in+ormation. The auniliary building ventilation cystem 3

L

. , _ . ,r., ..v.. -,m., -

-3,-. . . _ ,-,. - m ,,, , , , , . , _ , - _ . . , , , m-. . - . . . . . _ - , . - _ , . _ - , , . . _ . . _ . , , . - . . . - - . _

is discussed in FSAR Section 9.4.3 and is identified as -

safety-related. The auniliary control building ventilation system ic diccusced in FSAR Section 9.4.7 and is identified as nah-safety related. The FSAR in not clear as to the difference between thece two cyctems. Provide clarification of those two systems in terms of 1) areas and equipment serviced, protection of the cafety-related cyctem f r cm the non-safety related system (Regulatcry Guido 1.29, Position C.2), and 3) a figure chowing the ncn-safety rela-tod system and its relationship, if any, to the safety-related cyctem.

410.10 By Amendment 20 you revicad FSAR Figure 9.3-14 to conform (4.6) to the proposed Technical Specifications. This figure (9.3.5) graphically defines the upper and lower bounds of the allow-able sodium pentaborate concentrations and SLCS tank volume combinations. This figure identifies the minimum concentra -

tion level to be approximately 9.3%. Based en our indepen-dent analysic of this figure and in comparison to other similar figures, we find the 9.3% concentration to be non-con-

,carvative. Provide a revi sed FSAR and related Technical Specification figure with a lower bound which conforms to those of other BWRs.

410.11 In a submittal dated May 20, 1985 (RBS-21052), you statad (9.2.5) that design of the system to c.onitor the UHS basin uator temperature and to dotcraine the average water tc.nperature had been submitted for our review. You have tot cubmitted any decign for such a system for cur review. Provida a cystem dircription, PtID, and -c/ iced FSAR layout figure', )

. to show the proposed UHS watcr basin monitoring system.

9 4

_ - _ .