ML20141B245
| ML20141B245 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 05/14/1997 |
| From: | Diane Jackson NRC (Affiliation Not Assigned) |
| To: | NRC (Affiliation Not Assigned) |
| References | |
| NUDOCS 9705150198 | |
| Download: ML20141B245 (11) | |
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May 14, 1997 d
APPLICANT: Westinghouse Electric Corporation 4
FACILITY:'
AP600
SUBJECT:
SUMARY OF MEETING TO DISCUSS WESTINGHOUSE AP600 FIRE PROTECTION ANALYSIS The subject meeting was held at'the' Nuclear. Regulatory Commission (NRC) office in Rockville, Maryland on May 5, 1997,1between representatives of Westinghouse Electric Corporation (the applicant) and the NRC staff. The purpose of the meeting.was to discuss the status of the review of standard safety analysis report (SSAR) Section 9.5.1 and 9A. Attachment 1,is.a list of meeting
. participants.
l The April 7,1997, meeting handout, listing the staff's currently identified review issues, was used as a guide.for continued discussion.
For Numbers 7-and 8, the applicant requested the staff to review draft examples of SSAR markups that Westinghouse believes will resolve the issues if the changes are
'made to all of the fire areas. A telephone conference call was tentatively scheduled for the week of May 12,.1997, to provide the applicant feedback on its draft' examples. Attachment 2 is draft SSAR markups provided to the staff in the meeting.
i The staff issued its position letter on May 5, 1997. The next meeting is tentatively scheduled for May 19, 1997, in Rockville, Maryland.
original signed by:
Diane T. Jackson, Project Manager Standardization Project Directorate i
Division of Reactor Program Management Office of Nuclear Reactor Regulation Docket No.52-003 Attachments: As stated cc w/ attachments:
See next page DISTRIBUTION:
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" ICIAL RECORD COPY PDR ADOCK 05200003 E
1 Westinghouse Electric Corporation Docket No.52-003 cc: Mr. Nicholas J. Liparulo, Manager Mr. Frank A. Ross Nuclear Safety and Regulatory Analysis U.S. Department of Energy, NE-42 Nuclear and Advanced Technology Division Office of LWR Safety and Technology Westinghouse Electric Corporation 19901 Germantown Road P.O. Box 355 Germantown, MD 20874 Pittsburgh, PA 15230 Mr. Ronald Simard, Director Mr. B. A. McIntyre Advanced Reactor Program Advanced Plant Safety & Licensing Nuclear Energy Institute Westinghouse Electric Corporation 1776 Eye Street, N.W.
Energy Systems Business Unit Suite 300 Box 355 Washington, DC 20006-3706 Pittsburgh, PA 15230 Ms. Lynn Connor Ms. Cindy L. Haag Doc-Search Associates Advanced Plant Safety & Licensing Post Office Box 34 Westinghouse Electric Corporation Cabin John, MD 20818 Energy Systems Business Unit Box 355 Mr. James E. Quinn, Projects Manager Pittsburgh, PA 15230 LMR and SBWR Programs GE Nuclear Energy i
Mr. M. D. Beaumont 175 Curtner Avenue, M/C 165 Nuclear and Advanced Technology Division San Jose, CA 95125 Westinghouse Electric Corporation One Montrose Metro Mr. Robert H. Buchholz 11921 Rockville Pike GE Nuclear Energy Suite 350 175 Curtner Avenue, MC-781 Rockville, MD 20852 San Jose, CA 95174 Mr. Sterling Franks Barton Z. Cowan, Esq.
U.S. Department of Energy Eckert Seamans Cherin & Mellott NE-50 600 Grant Street 42nd Floor 19901 Germantown Road Pittsburgh, PA 15219 Germantown, MD 20874 Mr. Ed Rodwell, Manager Mr. S. M. Modro PWR Design Certification Nuclear Systems Analysis Technologies Electric Power Research Institute Lockheed Idaho Technologies Company 3412 Hillview Avenue Post Office Box 1625 Palo Alto, CA 94303 Idaho Falls, ID 83415 Mr. Charles Th% Ai, Nud<ar Engineer AP600 Certification NE-50 19901 Germantown Road Germantown, MD 20874
d WESTINGHOUSE /NRC AP60n MEETING
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FIRE PROTECTION MAY 5, 1997 MEETING PARTICIPANTS NatiE ORGANIZATION ED CONNELL NRR/DSSA/SPLB DIANE JACKSON NRR/DRPM/PDST TAD MARSH NRR/DSSA/SPLB
- STEVE WEST NRR/DSSA/SPLB ED CUMMINS WESTINGHOUSE DON HUTCHINGS WESTINGHOUSE JIM WINTERS WESTINGHOUSE 1
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Fire Protecdon Atunhary Systems i
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lhe Are Ntistance of the C PosHt* Fax Note 7671 Da* G/" >
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i Cornbusuble meserials in this Are area primarily consist of electrical cable insulatrm for cables feedmg the various Ams and pwnps widun this fire area. De cable raceways are fairly evenly chsenbuted wnhin the fire j
area, but there are N in the middle of the fire area and agacent to the west wall.
The equivalent fire destion for this fire area is less than osse hour, as shown in Table 9A-3. Mmunum three-
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hour fire bemer separation from a(acent fire areas is conse:vatively isc.-M to protect the high value squipment m this fire area and nicat the requirements br protection of a4 scent safety-related fire areas.
4 Thus, the fin is entmia-f withm the Ase arsa with or wahout active fire suppressica.
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A Arc in this fire area would most 1&ely originate within the den or pump moeors, and can be PMo I
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propasste slowly because of the nonvolatile nature of cable insulation and the low combustible loadas. For 4
this sensor., an automanc suppression systen is not warranted for this fire area.
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l PA.3.1.2.7.4 Fire Area 1250 AF 01 This fire assa is comprued of the following room (s):
Room NA 12501 Nuclear island nonradioactive vendladon system main control roorr/
division A and C equipment room nere are no systems in this Are area which normally enntam radioactive material.
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9A, Fire Proeectico Analysts Andiary Sysesas are Detection and Suppression Features Fire detectors Hose station (s)
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Portable fue extinguishers Smoke Control Festaris i
Fue damras cwee automancaDy in response to a srnoke detector signal or high i.%.--s to control the sprend of fire sed = d-W products. Srnoke and hot gases are subsequently removed frnen the fue area by using portable exhaust fans and ficxible dia;wmi.
" Fire Protecdon Adaq==ey Evaluanon A fire in this fue ama is detected by a Srw detector, which produces an audible alarm locaDy and both visual and audible alarms in the main contml room and the security central alarm stadon.
A fue in the fue area is extinguished manually using hose strearns or portable exdngmsbers.
'Ihis fire area contains two charcoal adsorbers, located in the nuclear island nonradioactive venn!anan system supplemental air fDtration imire Ftxed fire suppression systems are not required for these adsorbers hec =me of the high charcoal ignidon temperature. The nonnal was of the air flowing through the charcoal adsotters is well below 200'F, while the i
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minirimm charcoal ignition ~+ are is smater than 600dF. Two ind-a-~L at temperature sensors interfaa with the fire detection system providing charcoal wg.are indiariari and
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high and high-high Lug.adare alanns. "Ibe filtration unit fan trips at the high temperscue alarm setpofat. 'Ibe setpoints of both alarms are well below the charcoal igniden Luru.uare, allowing the operator time to investigare and take corrective action. In the unlikely event of a fue in the adsorber, the fdtradon unit can be manua3y isolated and sprayed with water from a nearby hose stadon to cool the charcoal and e#aaniA the fue.
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The venulacon system does not contribute o the spread of tbc fuior products of combustion i
ao other fue amas because fire dampers isolate the fue area.
Fire Protection System Integrrty An evaluanon of the mnw=-5 of inadvertent operation of an automane suppression systern is not regured because there are no such systems in this fire area. See Section 3.4 for a divumon of the consa-! of a break in a fire protection line in this fire area.
4 Revision: 11 T Wesdnghouse 9A.47 February 28,1997
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M meterials ist this fire area Consist of modsSt quantibes ofelectrical cable htse}ation and ordmary
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combosubies, but segar6 cant concentratsops of volatile chemicals are also likely to be present.
The equhalsat Are duration for this Are area is less than one hour, as shown in Table 9A-3, Because
=lealbaar raaerarranons of volatile chavnWis are likely to be present do h fire barner separation flrom
=4=e=a' 6te areas is conservauvely provid.id. Because the growth of a chandcal fire is rapid, an automatic Gre suppression system is also pie ided. Fire suppression activities prevent the fire fmm propagatmg beyond the nonrased buikbag extenor nII.
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9A.3.2.10 Fire Aram 2043 AF 01 This fue area is comprised o( the following room (s):
Room No.
20401
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These are no systems in this Are area wisch ma*=ia radsoective innaerial.
i Mrs Detection and P _,, __
Features F1re ? - :-75 Wet pipe sprinklers Hose station (s)
Portable fue extiriguishers
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Sanoke Centrol Fantures
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Fire dampers close autormently on high egmc to control the spread of fire and co+e= products. Smoke and hot gases are removed from the fire area using portable exhaust fans and flexible ductwork.
Fire Pressetion Adequacy Evahastion A fhe in this area is detected by a fire detector which produces an amWe alann locally with both visual and audable alarms in the rnain control room and security central alann station. The the is *WIM by the autornanc suppmsmon system or manually, using hose streams or portable extingmsbers x
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The venclation system do5s noc consnbutr. to the spread of the fue or products of combustio to other fun areas. Fire area boundaries are equipped with fire dampers to pievent the prope6ation of fue between fbe areas.
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s I 9A.3.4.18 Fire Area 4042 AF 01 This fue area is comprund of the following room (s):
1 Rmm No 40413 Electrical switchgear room I i
4 nis annex building fire area contains the non< lass lE switchgear for one train, and two motor generator sets and power cabiner. There are no systems in this fue area wtuch normally contain radioactive materiat Fire Detection and Suppression Features Fire detectors Hose stadon(s)
Portable fire extinguishers 4
Smoke Control Features
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Fue darnpers close automatically on,high temp ramre to control the spread of fire and combustion products. Smoke and hoc gases are removed fmm the fue area by reopening the fire dampers after a fus. The rerum fans of the ventilation system serving the area are manually aligned to the smoke purge mode to exhaust smoke a:d hu ;:.;e.s to the armosphere.
Fire Protection Adequacy Evaluation A fue in this fM: ama is detected by a fire detector which produces an audible alarm Iccally and both visual and audible alarms in the main control room and the security central alarm station.
The the is eatinguished manually using hose streams or portable eatinguishers.
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Combustible materials in this fire area prunarily consist of electrical cable insulation wrthin electrical equipment, cabinets and raceways. Dese components are fairly evenly distributed withm the fire area.
Here is a concentration of cables adjacent to the budding exterior wall.
i m aAjaced hrt sceses ne equivslant fire duraties@for this fire ares is less than one hour, as shown in Tab hour tire banier separatiogis conservadvely provided to protect the high value equipmcat in tu* is fire area.
j Fire suppression activities prevent the fire from pmpagating beyond the nonrated building extsrior wall.
,j A fire in this fire area would most likely originate withm the electrical equipment or cabinets, and can be q
aspected to propagate slowly because of the nonvolatile nature afcable==le and thelow combustible loading. For this reason, an automatic suppression system is not warranted fbr this fire area.
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The ventdanon sysism does not contribute m the spitad of the fire or products of combuscan to other fire assas because foe dampers isolate the area.
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TMF3-The qu ty ofe ustible in this one is very nsistm y cf I
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.. *ated msmm n in this zon though it '
ely that all of nents wo be dan-a fire in this Zone is ervativelv om-a' This fire acoeis pirysically zones by structural barriers consistin8 of concrete wn!12, floor and cedmg with mmmmun nommal thielmesses of two feet, except for an access i=Liw.y adjacent to the sfuelas caQwh[ch is covered % steel grating A fire does not_ propagate to o 9A.3.1.L3 Fire Zone 1100 AF 11206
,'Dris fire zone is compdsed of the followmg room (s):
kom No 11206 Passive core cooling system valve / accumulator room A Safe Shutdown Evaluadon Table 9A-2 lists the safe shutdown components contained in this fire zone.
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The quandry of combustib!c materials in this fire zone is very low, consistmg prunarily of I
I cable insulation telated to the valves located in this fire zone. A fire in this fitt zone is conservatively assumed to disable control of all of the valves and instrumentation in this fire zone. The passive core cooling system safe shutdown components located in fire zones 1100 AF 11207 and 1100 AF 11300B are redundant to those in this fire zone, and are sufficient to perform appifcable functions to achieve and unuin safe shutdown. The spent fuel pool cooling system containtnent isoladon valve located outside the containment fire area is redundant to the containment isolation valve inside containment in this fire zone and is sufficient to maintain containment integrity.
Rednahat reactor coolant hot leg instrurnents in fire zone 1100 AF 11204 provide the operator with information required to take cormctive action during reduced inventory operation.
_n Smoke and hot gases from a fire in this fire rse rise through the access hatchway and spread through the _
large maintenance floor air space (fire zones 1100 AF 11300A and B) where they are cooled by nuxina eth the air and by contact mth structural surfaces Smoke and hot gases thus do not cause pmpagation of the fire beyond this fire zone. Safe shutdown %, a listed in Table 9A-2 for the a4jacent fire zones are not susceptib!c to damage by the dduted and cooled smoke and gases from this fire zcoe.
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SA. Fire Protection Analysis A=% 7 Sptoms O
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S/a/M The steam line
.instrumenu located in area 1201 AF 05 for steam generator 1 and 4 1 AF 06 for steam seneraror 2 are sufficient to perform the applicable to acht
_ mat==M safe shutdown.
9A.3.1.
Zone 1100 AF 11300C i
e This are acne is physcally separated Aom odwr fim annan (eacept fire mone i100 AF 11500) by structural 4
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barners or pamal barners. The bottom of this fire acne is the solid concrute floor of the steam generator compammet. Freen here to an elevanon about 13 fbet above the opersair4 eck the Are sone is enclosed by d
comenee waus with a naamaal Ghs of three inst, except for access passageways to and fitan the pressursaar compartment (See anne 1100 AF 11303) and the a4poimas porean of the verneal access area (fire sons 1100 AF 11204), and the floor grating inserfsos between the temeal access area and the steam pseerstor' access comparansas (fire acce 1100 AF 11303). Above the top of these concrete waBs, the fire aans is open to the large air space above the operatsg deck (fire zone 1100 AF 11500).
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l 9A.3.1.1.10 Ftru Zone 1100 AF 11301 This fire zone is compnsed of the following room (s):
Room No.
l 11201 Steam generator compamnent 1 11301 Sesam generator 1 lower manway area 11401 Secam generssor 1 tubesbest area i
11501 Steam generator 1 operating deck 11601 Steam generator 1 feedwater nozzle area 1
11701 Steam generator 1 upper manway area Safe Shetdown Evaluation
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i Table 9A-2 tima the safe shutdown componenu located in this fire zone M_'* '= '
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_: "- %.,cm and wnwnt of combustible materials in this fire zone are such that a fire w uch damages safe som-..
componeau in this fire zone does not pecpagate to the extent that it damages redam safe shutdown components outside this fire zone.
j The quanury of cornbustible materials in this fire zone is very low, consistmg pnmarily of i
i cable insulanon related to the components in this fue zone and the reactor coolant pump i
i mosors. Although the consequences of a the are expected to be very limited, a fire in this fire zone is conse vatively assumed to disable all of the safe shutdown e-:,=--u in this fire zone.
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9A. Fire Protect 6co Analysas Auxiliary Syrtems The redundant reactor coelant system feurth stage automatic depressunzation system valves and hot les/ cold leg instmmentation located in Sre zone 1100 AF 11302 and redundant reacter coolant system pressurizer and stearn generator system steam generator level instrumentation located in 1100 AF II300B are sufficient to perform applicable functions to achieve and maintain safe shutdown.
The four divisions of reactor coolant system / reactor coolant pump beanng water temperature mstrumentation are assumed to be disabled and would not be available to detect and provide a trip signal on a loss of component cooling water to the pump. If the fire in this fire zone does not disable the pump. the component cooling water flow to the pump will be unaffected by the fire and will continue to provide cooling water to the pump bearm5s until the pump
,is tripped by other means, bt reactor coolant system reactor coolarit pump shaft speed instruments are cons assuud to be disabled. The redundant reactor coolant system cold leg flow mstrumentation locateci in fire zones 1100 AF 11300A and 1100 AF 11300B is sufficient to perform applicable functions to achieve and maintain safe shutdown.
The four reactor coolant system rescrer head vent valves are assumed to be disabled. If power is lost while in the closed position, the head vent valves will maincain reactor coolant pressure boundary integ: fry. Refer to subsection 9A.2.71.1 for a discussion on spurious actuation of reactor coolant system reactor head vent valves.
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Daradias on fire location, smoke and hot gases fhxn a fire in this fire zone rise through the ammlmr space surrounding the steam gaa or through the pressurtar compartment (fire zonc !100 AF 11303)and into the air space in the upper portion of the maram-nent (fire zone !!00 AF 11500) where they are cooled by mixing with the surroundmg air and by contact with structural surfaces. Smoke and hot gases thus do not cause propagation of the fire beytod this fire zone. Safe shutdown components listed in Table 9A-2 for the adjacent fire zones are not susceptible to damage by the diluted and cooled smoke and gases frtrn ttus fire zone.
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1802 generator 2 upper manway area Safe ' utdown t tion able 9A 2 ' u the safe shu e
ponents 1 ated in this fire zone. This fire zone is physically parated from o r nas (ex fire zone 1100 AF tural barriers o labyrinths su a fire d repagate to or s fire zone.
- fire zone bo s fue 1 AF 11500 at th op enerator comp t, which is ope to the space above the dng deck quantity and gement of co stibt rials in this fire zone such a Src damage safe shordown in this fire zone does not p to the extent that it r-daadant safe com shu components outside this fire zone.
Revisioot 11 3 WaElW1ghouse 9A 19 February 28,1997
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GHolahan, 0-8 E23 BThomas, 0-8 D1 i
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