ML030770349

Document Review & Approval, Tech Spec Bases B 3.7.5, Auxiliary Feedwater (AFW) System

ML030770349
Person / Time
Site:	Point Beach
Issue date:	09/10/2002
From:	Black D, Chapman R Nuclear Management Co
To:	Office of Nuclear Reactor Regulation
References
FOIA/PA-2003-0094
Download: ML030770349 (20)

Text

Nuclear Power Business Unit DOCUMENT REVIEW AND APPROVAL Note: Refer to NP 1.1.3for requirements Page I of 2 I - INITIATION Doec Number Tech Spec Bases B 3.7.5 Unit PBO Usage Level NA Proposed Rev No NA Title Auxiliary Feedwater (AFW) Ststem Classification X11t ED Revision El Cancellation [I New Document [] Other (e g, periodic review, admin hold)

List Temporary Changes/Feedbacks Incorporated: NA Description of Alteration/Reason (If necessary, continue description of changes on PBF-0026c and attach)

Changes to Tech Spec Bases changes to reflect upgrade of the open function of AFW pump mini-recirc valves (1/2AF-4002. AF-4007. ajnd AF-4014) to safety-related (MR 02-029).

List other documents required to be effective concurrently with the revision (e.g..,other procedures, forms, drawings, etc.):

Technical Specification Bases List of Effective Papes Document Preparer (print/sign) - David Black /--. Date f /0-0I - ...

Indicates draft prepared according toNPI.L3, any commitments/bases changes have been documented and resolved.

.1! - TECHNICAL REVIEW

-(Cannot be the-Preparer or Approval Authority)

Technical Reviewer (print/sign) Rob Chapman / Date __-I__'_.

Indicates draft technically correct, consistent with references/bases/upper tier requirements, requi//ments of NP 1.1.3 completed HI - DOCUMENT OWNER REVIEW Required Reviewers/Organizations:

Validation Required? Z NO []YES Q'WAIVED (Group Head Approval and Reason Required)

Reason Validation Waived:

-.. , Continue on PBF-0026c if necessary.

Validatioa"Waiver Approval:

Group Head Signature Changes pre-screened according to NP 5.1.8? Dl NO E] YES (Provide docunientation according to NP 5.1.8)

Screening completed according to NP 5.1.8? El NA 2 YES (Attach copy) Safety evaluation.required? Z NO El YES Training or briefing required? [3 NO E] YES "IfYES, training or briefing required before issue? El NO [D YES Training assistance desired? [O NO [: YES If YES, Training Coordinator contacted/date: /

E] QR/MSS Review NOT Requfred (Admin orNNSR only) -. ] QR Review Required El MSS Review Required (reference NP 1.6.5)

Document Owner (print/sign). - -. .. / Date Indicates document is technically correct, can be performed as written, does not adversely affect personnel or nuclear safety, appropriate reviews have been performed (i e., technical, cross-disciplinary, validation and 50 59/72.48), comments have been resolved and incorporated as appropriate, affected documents/training/briefing have been identified and word processing completed. Document Control notified if emergent issuance required (e.g , may be less than 2 days for procedure issuance)

IV APPROVAL IV -APPROVAL (The Preparer, Qualified Reviewer (QR), and Approval Authority shall be different Individuals)

QR/MSS (print/sign) / Date Indicates 50.59/72.48 applicability assessed, any necessary sCreenings/evaluations performed, determination made as to whether additional cross disciplinary review required, and if required, performed MSS Meeting No.

Approval Authority (print/sign) / Date V - RELEASE FOR DISTRIBUTION El NA El YES Pre-implementation requirements complete (e.g, training/briefings, affected documents, word processing, etc.).

El Specific effective date not required. Issue per Document Control schedule.

El Required effective date: (Coordinate date with Document Control)

Document Owner/Designee (print/sign) / Da* I Effective Date (to be entered by Document Control) _ ___

PBF-0026a l

References NP 1.1 3, NP 1.1.5, NP 1.16 R n 'efl- IMIn') NPI 71 VN1PI 71 NP 6

Point Beach Nuclear Plant DOCUMENT REVIEW AND APPROVAL CONTINUATION Page 2 of 2 Doc Number Technical Specification Bases B 3.7.5 Revision I Unit 0 Title Auxiliary Feedwater (AFW) System Temporary Change Number N/A Description of Changes:

Step

• Change/Reason Added: "The recirculation lines from each pump connect to a single header. The header is aligned to a Condensate Storage Tank (CST) and is the normal flowpath for recirculation flow." after line in second paragraph that begins "Each pump is provided with ... " MR 02-029 changed the reclassification of the page B 3.7.5-1 open function of the AFW pump recirculation valves to safety-related. (SCR 2002-0359)

Deleted Condensate Storage Tank and parens for CST since this was redundant after the above change page B 3.7.5-1 was added. (Pre-screening #1 Editorial)

Added. "... a minimum recirculation flow path is OPERABLE," to reflect the reclassification of the page B 3.7.5-4 open function of the AFW pump recirculation valves to safety-related. (SCR 2002-0359) i i

I i

i Other Comments

• Note Recording of Step Number(s) is not required for multiple occurrences of identical information or when not beneficial to reviewers PBF-0026c Revision 6 04118/01 References NP 1.1 3, NP 1 2.3

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Venrfy SCR number on all pages Page I Title of Proposed Activity: Remo, al ofInternals from -F-I 17 and Upad, n fincion ...

-ff AEW. p....Mp ,;ý; . V-hcs to Safety-Related (MR 02-09)

Associated Reference(s) #: SCR 2002-0010-01, SCR 2002-0321.and 2002-0339; MR 01-144, AF-4007/4014 Backup Nitrogen Supply, MR 02-001, I/2AF-4002 Backup Air Supply; EVAL 2002-005, Permanent Plant Changes to Address Simultaneous Failure of All AFW Pumps; FCR 02-019; SE 97-085, MR 97-038 AFW Motor Driven Pump Pressure Dischsrge Valve Modification; Fay Letter to NRC, NRC Bulletin 88-04, Potential Safety-Related Pump Loss, June 28, 1988; NPM 2002-0228, Designation Of Backup Pneumatics For AFW Mini- Recirculation Valves As Safety-Related, NRC 2002-0068, Point Beach Nuclear Plant, Units 1 and 2 Reply to a Notice Of Violation (EA-02-03 1) NRC Special Inspection Report No. 50-266/01-17 (DRS); 50-301/01-17 (DRS).

Prepared by: David Black Date: *- S-- 2 9 'L.

Name ( Print) Signature Reviewed by: Rob Chapman Date:

Name (Print) S64fture PART I (50.59/72.48) - DESCRIBE THE PROPOSED ACTIVITY AND SEARCH THE PLANT AND ISFSI LICENSING BASIS (Resource Manual 5.3.1)

NOTE: The "NMC 10 CFR 50.59 Resource Manual" (Resource Manual) and NET 96-07, Appendix B. Guidelines for 10 CFR 72.48 Implementation should be used for guidance to determine the proper responses for 10 CFR 50.59 and 10 CFR 72.48 screenings.

1.1 Describe the proposed activity and the scope of the activity being covered by this screening. (The 10 CFR 50.59 / 72.48 review of other portions of the proposed activity may be documented via the applicability and pre-screening process requirements in NP 5.1.8.) Appropriate descriptive material may be attached.

The scope ofthis screeninginvolves thefollowing activities associatedwith MR 02-029:

- Remove internalsfor AF-I17, the Auxiliary Feedwater Pump Common Mini-Recirc Header Check Valve to-prevent a common mode activefailure in the recircreturn header.

- Upgrade openfunctionfor all Auxiliaryfeedavaterpump mini-recircvalves to safety-related (also being done by 1ST groupfor procedure changes under screenings SCR 2002-0321 and 2002-0339.

- State in the FSAR (FSAR 10.2) and Technical Specification Bases(B 3. 7.5) that (1) the openfunctionforall Auxiliary feedwazer pump mini-recirc valves is safety-relatead and(2) the recirculationline downstream of the flow restrictingorifices has a safety fniction and is requiredforAFW operability, but the line is not safety-relatedsincefailureofthe line is conservative The Bases will indicatethat the mini-recirculationflowpathshave to be OPERA4BLEfor the.AFW.system to be operable.

A simplfied P&ID of the mini-recircheader is shown below To Condensate Storage Tank T-24B From P-38A. P 38B & 2P-29 From 1P-.29 To Condensate Storage 7ank T-24A I-CI

. 15L.

['131--1I

!,.,cnL.,: 'tP 5 ' ,

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all pages Page 2 EVAL 2002-005 evaluatedpermanentprocedure changes that were implemented in response to a condition (CR 01-3595) that was identified where, with a procedure-directedoperatoraction to controlsteam generator level (which could be accomplishedby reducingflow through one or more AFWpumps), concurrent with a loss of instrument air (which would cause the AFW pumps' mint-recirculationvalves tofail close), the potentialexistedfor a simultaneousfailure of the multi stage high pressureAFW pumps due to very low or noflow through runningAFW pumps. The procedurechanges added instructions to the operatorsthat if any AFWpump mini-recircvalve fails shut OR annunciator CO I A 1-9, INSTRUMENT AIR HEADER PRESSURE LOW is in alarm, then monitor and maintain minimum AFWflow or stop the affected AFW pump as necessary to controlSIG levels. Minimum flow valuesfor each pump were also included in the procedures. The majority ofthe changes were associatedwith EOP and ECA foldoutpages. The procedures were initiallyrevisedas a compensatory measure to supportAFW pump operability. The 50.59 evaluation reviewed the procedure changes as apermanent change to the proceduresas described in the FSAR to confirm consistency with the licensing basis. The permanentprocedure changes restoredthe AFWpumps tofilly operablestatus.

This evaluation also was the basisfor changes to the FSAR to ciarify that the mini-recirculationvalves requireinstrument air tofunction and that eithera pump minimum flow is maintainedorpumps are secured if the valve fails or instrument air is lost (FCR 02-019).

ScreeningSCR 2002-0010-01 reviewed modifications to provide backup air sources to allAFW pump minimumflow recirculationvalves. These modifications were an enhancement that reduced the core damageprobabilityfrom a loss of instrument airand increasedthe time for an operatorto take manual action to override the valves open. Instrument air accumulatortanks were installedby MIR 02-O01for the 1/2P-29 valves (1/2AF-4002), andthe existing nitrogen backup system for the MDAFP dischargevalves were tied in by MR 01-144for the P-38A/B valves (AF-4007, AF-4014).

Point Beach has made an NRC commitment to upgrade the openfunctionfor all mini-recircvalves to safety-relatedas stated in NMC letter NRC 2002-0068:

"To further improve thefuture effectiveness of the AFW system by providing additionalpump protection againstlow flow. Point Beach is classifying the openrinctionof the pump recirculation flow control valves, as safety-related This will provide a redundantmethod of providingforminimum AFWpumpflow and consequently, pump cooling. As a result, testing andquality assurance requirementsrequiredforsafetV-relatedfunctions will be applied to the open finction of these valves.

As discussedpreviously, internalpump cooling is designedto be provided by minimumforwardflow through the pumps. Classifying the recirculationflow control valves as safety-related will provide greaterassurancethat minimum flow will be availableto provide internalpump cooling. The pneumatic backup supply to the recirculationflow control valves is limiting and therefore Point Beach will also continue to specify operatoraction to manually open these recircudationvalves. Similar to other plants, Point Beach has one common recirculationflowpathfrom all the AFW pumps to the condensatestorage tanks" The scope of this screening also includes FSAR changes and Technical Specification Bases changes to coincide with the mini-recirculationsafety upgrade described above.

1.2 Search the PBNP Current Licensing Basis (CLB) as follows: Final Safety Analysis Report (FSAR), FSAR Change Requests (FCRs) with assigned numbers, the Fire Protection Evaluation Report (FPER). the CLB (Regulatory) Commitment Database, the Technical Specifications, the Technical Specifications Bases, and the Technical Requirements Manual. Search the ISFSI licensing basis as follows: VSC-24 Safety Analysis Report, the VSC-24 Certificate of Compliance, the CLB (Regulatory)

Commitment Database, and the VSC-24 10 CFR 72.212 Site Evaluation Report. Describe the pertinent design function(s),

performance requirements, and methods of evaluation for both the plant and for the caskLISFSI as appropriate. Identify where the pertinent information is described in the above documents (by document section number and title). (Resource Manual 5.3.1 and NEI 96-07, App B. B.2)

The.Arilir'. Feedwater t4FIV) sYstem has the followvgfing ctions de.cr:hcd in the hcc,7stng basis

a. To uutomuticallv start and ensure that aaeziuatefeedwater is supplied to the steam generatorsJor heat removal huritng accilents whtwn may result ;n a ,,zarn steam 3akrtv 'salve opentim7, tLoss oJ Vormal Fee'd*atel - inCluding A TWS and Loss ofAC to the Station A.ilitaries)

PBrI'-1 c R.vibion I U4,03,0'- ,wreic.': N11. 1.3

Point Beach Nuclear Plant SCR 2002-0359 "10CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all page Page 3

b. To automaticallystart andprovide flow to maintain steam generator levels during accidents which require or result in rapidreactorcoolantsystem cooldown tSteam Generator Tube Rupture and Rupture of a Steam pipe,.

c. To allow the isolation of all lines to the rupturedsteam generatorin the SGTR event.

d To provide sufficient feedwater to remove decay heatfrom both units for one hour during a station blackout (SBO) event (TDAFP only).

e. To provide sufficient flow to the steam generators to remove decay heat to achieve cold shutdown within 72 hour8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />sfollowing a plantfire (Appendix R).

f To withstand a seismic event (i.e., the seismic Class 1 portions of the system) and to ensure that steam generator levels are maintainedduring a seismic event.

g. To provideflow to the steam generators duringplantstartup andshutdown, and during hot shutdown or hot standby conditionsfor chemical additionsand when operationof the mainfeedwater andcondensate systems is not warranted These modifications affect the operation ofthe minimum recirculationvalvesfor the auxiliaryfeedwaterpumps (1/2AF 4002, AF-4007, AF-4014). These valves have the following designfunctions:

1. To isolate the minimum recirculationline to ensure that the auxiliaryfeedwaterpumps deliver the requiredflow to the steam generatorsas needed to support thefollowing accidents or events: LONF, LOA C, MSLB, SGTR, A TWS, Appendix R, andSBO

2. To open to provideflow through the auxiliaryfeedwaterpumps to prevent hydraulic instabilitiesand to dissipatepump heat.

3. To maintain the pressureboundary integrity of the auxiliaryfeedwater system.

FSAR 10 2.2, System Design and Operation,states: "The auxiliaryfeedwater system consists oftwo electric motor-driven pumps, two steam turbine-drivenpumps,pump suction anddischargepiping,and the controls and instrumentationnecessary for operationof the system. Redundancy is provided by utidingtwo pumpingsystems, two different sources ofpowerfor the pumps, and two sources of water supply to the pumps. The system is categori:edas seismic Class I and is designed to ensure that a singlefault will not obstructthe system/function" CLB

References:

FSAR 7.2.3.2- Specific Control and Protection lnteractioni FSAR 7.3.3.4 - Manual AFW Flow Control During Plant Shutdown FSAR Section 7 4.1 -AMSAC FSAR Section 10. 1 - Steam and Power Conversion System FSAR Section 10.2 - ALciliary Feedwater FSAR Figure 10 2-1 Sheet I - Bech M-217 Sh. I -Awuxiliary FeedwaterSystem FSAR Figure 10.2-1 Sheet 2 - Bech M-217 Sh. 2 - Auxiliary FeedwaterSystem FSAR Section 14.1.10 - Loss ofNormal Feedwater FSAR Section 14.1.11 - Loss ofAll A C Power to the Station Auxiliaries FSAR Section 14.2.4 - Steam GeneratorTube Rupture FSAR Section 14.2.5 - Rupture ofa Steam Pipe FSAR Appendix A. 1 - Station Blackout FPER 5.2.2 - Safe Shutdown Systems and Equipment FRER 5.2.5.2.3 -AAuiliary Feedvater Pump Room Tech Spec 3.7.5- Auxiliary Feedwater Tech Spec Bases B 3.7.5- Auxiliary Feedtvater NRC 2002-0068, Point Beach Nuclear Plant, Units I and2 Reply to a Notice Of Violation (EA-02-031) NRC Special Inspection Report No 50-266/01-1 7 (DRS): 50-301/01-17 (DRS) 1.3 Does the proposed activity involve a change to any Technical Specification? Changes to Technical Specifications require a License Amendment Request (Resource Manual Section 5 3.1.2).

Technical Specification Change - E] Yes [] No If a Technical Specification change is required. explain what the change should be and %Vhy it is required rB r-; i4 . c R- ltull I 0-4103,02 n,; P ,

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all pages "Page 4 1.4 Does the proposed activity involve a change to the terms, conditions or specifications incorporated in any VSC-24 cask Certificate of Compli ace (CoC)? Changes to a V ,Cn.mt 'CqueS a Co-C aaI L E]Yes Z No If a storage cask Certificate of Compliance change is required, explain what the change should be and why it is required.

10 CFR 50.59 SCREENING PART 11 (50.59) - DETERMINE IF THE CHANGE INVOLVES A DESIGN FUNCTION (Resource Manual 5.3.2)

Compare the proposed activity to the relevant CLB descriptions, and answer the following questions:

YES NO QUESTION ED El Does the proposed activity involve Safety Analyses or structures, systems and components (SSCs) credited in the Safety Analyses?

0] El Does the proposed activity involve SSCs that support SSC(s) credited in the Safety Analyses?

0 El Does the proposed activity involve SSCs whose failure could initiate a transient (e.g., reactor trip, loss of feedwater, etc.) or accident, OR whose failure could impact SSC(s) credited in the Safety Analyses?

0] El Does the proposed activity involve CLB-described SSCs or procedural controls that perform functions that are required by, or otherwise necessary to comply with, regulations, license conditions, orders or technical specifications?

El 0] Does the activity involve a method ofevaluation described in the FSAR?

El 0 Is the activity a test or experiment? (i e., a non-passive activity which gathers data)

El 0] Does the activity exceed or potentially affect a design basis limitfor afissionproduct barrier(DBLFPB)?

(NOTE: If THIS questions is answered YES, a 10 CFR 50.59 Evaluation is required.)

If the answers to ALL of these questions are NO, mark Part 1II as not applicable, document the 10 CFR 50.59 screening in the conclusion section (Part IV), then proceed directly to Part V - 10 CFR 72.48 Pre-screening Questions.

If any of the above questions are marked YES, identify below the specific design function(s), method of evaluation(s) or DBLFPB(s) involved.

1. The AF-117 check valve has an implicitfinction to open to allow minimum recirculatuonflowvfromthe auxiliaryfeedwater pumps to returnto the condensatestorage tank(s). There is no direct discussion ofthis fitnction in the licensing basis, other than that the valve appearsin FSAR Figure 10.2-1.

A search ofplant documents did not yield any'reference to a needfor valve AF-J 17 to close (or remain closed) The following uses were consideredas possiblefunctionsforthe closed position:

a. To prevent backflow of heating steam condensate from entering the mini-recirculation return header. Given that the min recirculationheader is not drainedandremainsfilled with water during and after pump operation,migration ofheatingsteam condensate into the header in any significantamounts is unlikely Further,the plant no longer returns heatingsteam condensate to the condensatestorage tank because of water quality concerns, and it is extremely unlikely that this plant designfeature will ever be used again Regardless. this reasonforpreventing backflow does not constitute a licensing basis designfimnction.

Therefore thisfiunction will not be evaluated /br adverse //fects.

b. To prevent backflow and siohonin,_, of %ater from the condensate storae tanks through AF-4035 in the event that this valve onens due to high pressure in the line. or que to a break in the header. The alh'e's nominalreiefsettTng is 50 psi For.AF-4035 to open, either an event occurs where miitiple pumos start with high recircflowratesandprc-ssurize the line. or there is a blockage in the line The sufer,-relatedjlow restrtctimg oryjces in the recirchnejrom each .4FWV pum lnmtt the flow and pressurejiroi each pump Further,V the line is blocked either by inispostioningoj manual valves orjaiireot the check valve to PBF-I 15Nc 2 Re Iblt*fl 1 4J4,03,0 :ltc l Lr:n., \I'i . I

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all pages Page 5 open, there is noflowpathfor backflow. The only credible wayfor the headerto break is during a seismic event, in which case waterfrom the condensate storage tank cannot be ,i. ,j') ...

accid,-t .

i.a. . . VV -1Y.:- ....r J.af -- ,

condensatestorage tanks cannot be considereda licensing basis designfunction. Therefore thisfunction will not be evaluated for adverse effects.

2. The minimum recirculationvalves for the auxiliaryfeedwater pumps (1/2AF- 4002, AF-4007,AF-4014) have the designfunctions to isolate the minimum recirculationline to ensure that the auxiliaryfeedwaterpumps deliver the requiredflow to the steam generatorsas needed to support the mitigation of accidents or events. The proposedactivity is to make the open finctionfor these valves a safety-relatedfunction. The new componentsfor modificationsMR 02-001 andMR 01-144 as discussedabove were installedsafety-relateddue to their risk significance. These components were classifiedsafety-relatedbased on a PBNP management decision, as describedin NPM2002-0228. These modifications ensure a safety-relatedsupply of airor nitrogento ensure that the auxiliaryfeedwaterpumps have adlequate cooling.

PART 111 (50.59) - DETERMINE WHETHER"THE ACTIVITY INVOLVES ADVERSE EFFECTS (Resource Manual 5.3.3)

If ALL the questions in Part II are answered NO, then Part III is Dl NOT APPLICABLE.

Answer the following questions to determine if the activity has an adverse effect on a design function. Any YES answer means that a 10 CFR 50.59 Evaluation is required; EXCEPT where noted in Part 111.3.

111.1 CHANGES TO THE FACILITY OR PROCEDURES YES NO QUESTION El 0 Does the activity adversely affect the designfunction of an SSC credited in safety analyses?

El 0] Does the activity adversely affect the method of performing or controlling the designfunction of an SSC credited in the safety analyses?

If any answer is YES, a 10 CFR 50.59 Evaluation is required. If both answers are NO describe the basis for the conclusion (attach additional discussion as necessary):

1. The onlyfunction tdentifiedfor the AF-117 check valve was to open to allow mint-recirculationwaterfrom ,4FWpumps to return to the condensate storage tank It has no designfunction to close. Therefore removing the check valve internals has no adverse effect on the openfunction andprecludes the valvefrom failing to open.

2. The change in designationof the openfunction ofmini-recirculationvalves 1/2AF- 4002, AF-4007, AF-4014 as safety relatedhas no adverse affect on the valve's function to open or close. The openfunction was a designfunction desribed in the FSAR. Designatingthe openfunction as safety-relatedrequires addition quality control and testing andshould, therefore, make the openfunctions of the valve more reliable. The necessary backup air/nitrogen supplies were installed as safety-relatedso no additionalphysical changes to the plant are required SCR 2002-0010-01 assessedthe installation of these backup pneumaticsupplies on the closefunction of the valves and no adverse effects were identified. Therefore there is no adverse effect on the functions of these valves.

3. Changes will be made in the FSAR to state that the open functionfor all.4uxiliaryfeedwaterpump mini-recirc vaives is safety-related. The Technical SpecificationBases will indicate that the mmzn-recircuiattonflowpathshave to be OPERABLEfor the .4FW system to be operable. These changes only reflect the activities discussedabove, whzch have alreadv been assessedanddeterminedthat there is no adverse effect on a designfunction FSAR changes will also be made to reflect the rec'rculationline downstream of the flow restrictingorifices has a safetyfunction and is requiredfor AFW operability, but the line is not safety-relatedsincefailure of the line is conservative No physical changes were made to this line. Ifthe linefails. a break or opening will be created which may mncrease overallflow through the recirculationine. Tire service-waterzvstem is the sajen.-relatedwater Tupplyjor die 4FIV system The ,'oss of CST inventorv due to the linefiling and rec:rcuiauonwater spilling oni' affecls the nO7-safety-relatedwater sourcztjor the

.4FIV system. The reotunredminimum CST water ,s based on the station blac.koutfSBO) event, SBO Is not an el ent :hat would cause this line toail toven) Theretore. basca on the abome the licensing basiT docrtnrents changes Jo not .a-ve an adverse effect on an" de* ignizinctions PlI F-ti .4I.c1 R,3I:,

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all pages Page 6 111.2 CHANGES TO A METHOD OF EVALUATiON (If the activity does not involve a method of evaluation, these questions are Z NOT APPLICABLE.)

YES NO QUESTION 5] 5] Does the activity use a revised or different method of evaluation for performing safety analyses than that described in the CLB?

E5 E5 Does the activity use a revised or different method of evaluation for evaluating SSCs credited in safety analyses than that described in the CLB?

If any answer is YES, a 10 CFR 50.59 Evaluation is required. If both answers are NO describe the basis for the conclusion (attach additional discussion, as necessary).

111.3 .TESTS OR EXPERIMENTS If the activity is not a test or experiment, the questions in III.3.a and III.3.b are Z NOT APPLICABLE.

a. Answer these two questions first:

YES NO QUESTION 51 5l Is the proposed test or experiment bounded by other tests or experiments that are described in the CLB?

E5 51 Are the SSCs affected by the proposed test or experiment isolated from the facility?

If the answer to BOTH questions in V.3.a is NO. continue to IlI.3.b. If the answer to EITHER question is YES, then describe the basis.

b. Answer these additional questions ONLY for tests or experiments which do NOT meet the criteria given in III.3.a above.

If the answer to either question in III.3.a is YES, then these three questions are Z] NOT APPLICABLE.

YES NO QUESTION 5] 5] Does the activity utilize or control an SSC in a manner that is outside the reference bounds of the design bases as described in the CLB?

5] 5l Does the activity utilize or control an SSC in a manner that is inconsistent with the analyses or descriptions in the CLB?

5 5] Does the activity place the facility in a condition not previously evaluated or that could affect the capability of an SSC to perform its intended functions?

If any answer in III.3.b is YES. a 10 CFR 50.59 Evaluation is required. If the answers in lI.3.b are ALL NO describe the basis for the conclusion (attach additional discussion as necessary):

PBF- 4515L Rercrence NP 5 I 3 Revis$in I

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all pages Page 7 Part IV- 10 CFR 50.59 SCREENING CONCLUSION (Resource Manual 5.3.4).

Check all that apply:

"A10 CFR 50.59 Evaluation is E] required or Z NOT required.

"APoint Beach FSAR change is Z required or E] NOT required. If an FSAR change is required, then initiate an FSAR Change Request (FCR) per NP 5..6.

A Regulatory Commitment (CLB Commitment Database) change is El required or Z NOT required. If a Regulatory Commitment Change is required, initiate a commitment change per NP 5.1.7.

A Technical Specification Bases change is [R required or E] NOT required. If a change to the Technical Specification Bases is required, then initiate a Technical Specification Bases change per NP 5.2.15.

A Technical Requirements Manual change is [] required or Z NOT required. If a change to the Technical Requirements Manual is required, then initiate a Technical Requirements Manual change per NP 5.2.15.

10 CFR 72.48 SCREENING NOTE: NEI 96-07, Appendix B. Guidelines for 10 CFR 72.48 Implementation should be used for guidance to determine the proper responses for 72.48 screenings.

PART V (72.48) - 10 CFR 72.48 INITIAL SCREENING QUESTIONS Part V determines if a full 10 CFR 72.48 screening is required to be completed (Parts VI and VII) for the proposed activity.

YES NO QUESTION El [] Does the proposed activity involve IN ANY MANNER the dry fuel storage cask(s), the cask transfer/transport equipment, any ISFSI facility SSC(s), or any ISFSI facility monitoring as follows: Multi-Assembly Sealed Basket (MSB), MSB Transfer Cask (MTC), MTC Lifting Yoke, Ventilated Concrete Cask (VCC), Ventilated Storage Cask (VSC), VSC Transporter (VCST), ISFSI Storage Pad Facility, ISFSI Storage Pad Data/Communication Links, or PPCS/ISFSI Continuous Temperature Monitoring System?

El 1Z Does the proposed activity involve IN ANY MANNER SSC(s) installed in the plant specifically added to support cask loading/unloading activities, as follows: Cask Dewatering System (CDW), Cask Reflood System (CR.F), or Hydrogen Monitoring System?

El [] Does the proposed activity involve IN ANY MANNER SSC(s) needed for plant operation which are also used to support cask loadingfunloading activities, as follows: Spent Fuel Pool (SFP), SEP Cooling and Filtration (SF),

Primary Auxiliary Building Ventilation System (VNPAB), Drumming Area Ventilation System (VNDRM),

RE-105 (SFP Low Range Monitor), RE-135 (SFP High Range Monitor), RE-221 (Drumming Area Vent Gas Monitor), RE-325 (Drumming Area Exhaust Low-Range Gas Monitor), PAB Crane, SFP Platform Bridge.

Truck Access Area, or Decon Area?

El [] Does the proposed activity involve a change to Point Beach CLB design criteria for external events such as earthquakes. tornadoes, high winds, flooding, etc.?

El 2 Does the activity involve plant heavy load requirements or procedures for areas of the plant used to support cask loading'unloading activities?

El z Does the activity involve an,, potential for fire or explosion where casks are loaded, unloaded, transported or stored?

If ANY of the Part V questions are answered YES.,then a full 10 CFR 72.438 ,creeninu is required and answers to the questions in Part VI and Parn VII are to be providea. If ALL the questions in Part V are ansxvered NO. then check Parts VI and VII as not applicable. Complete Part VIII to document the conclusion that no 10 CFR 72.48 evaluation is recuired.

PBF-15I 15c Revision I 04,i)3,02 Itt.m.r-n '41' 1I

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Veify SCR numnberon all page Page 8 PART VI (72.48) - DETERMINE IF THE CHANGE INVOLVES A ISFSI LICENSING BASIS DESIGN FUNCTION (If ALL the questions in Part V are NO, then Part VI is [E NOT APPLICABLE.)

Compare the proposed activity to the relevant portions of the ISFSI licensing basis and answer the following questions:

YES NO QUESTION E3 [3 Does the proposed activity involve cask/ISFSI Safety Analyses or plant/cask/ISFSI structures, systems and components (SSCs) credited in the Safety Analyses?

5l Does the proposed activity involveplant, cask or ISFSI SSCs that support SSC(s) credited in the Safety Analyses?

5 5] Does the proposed activity involve plant, cask or ISFSI SSCs whose function is relied upon for prevention of a radioactive release, OR whose failure could impact SSC(s) credited in the Safety Analyses?

"5 5] Does the proposed activity involve cask/ISFSI described SSCs or procedural controls that perform functions that are required by, or otherwise necessary to comply with, regulations, license conditions, CoC conditions, or orders?

[ 5 Does the activity involve a method of evaluation described in the ISFSI licensing basis?

E5 E5 Is the activity a test or experiment? (i.e., a non-passive activity which gathers data)

E5 E5 Does the activity exceed or potentially affect a cask design basis limitfor afissionproduct barrier(DBLFPB)?

(NOTE: If THIS questions is answered YES, a 10 CFR 72.48 Evaluation is required.)

If the answers to ALL of these questions are NO mark Parts VII as not applicable, and document the 10 CFR 72.48 screening in the conclusion section (Part VIII).

If any of the above questions are marked YES, identify below the specific design function(s), method of evaluation(s) or DBLFPB(s) involved.

PART VII (72.48) - DETERMINE WHETHER THE ACTIVITY INVOLVES ADVERSE EFFECTS (NEI 96-07, Appendix B, Section B.4.2.1)

(If ALL the questions in Part V or Part VI are answered NO then Part VII is Z NOT APPLICABLE.)

Answer the following questions to determine if the activity has an adverse effect on a design function. Any YES answer means that a 10 CFR 72.48 Evaluation is required; EXCEPT where noted in Part VII.3.

VII. I Changes to the Facility or Procedures YES NO QUESTION E5 E5 Does the activity adversely affect the designfimnction of a plant, cask, or ISFSI SSC credited in safety analyses?

El El Does the activity adversely affect the method of performing or controlling the designfiunction of a plant.

cask. or ISFSI SSC credited in the safety analyses?

If any answer is YES. a 10 CFR 72.48 Evaluation is required. If both answers are NO, describe the basis for the conclusion (attach additional discussion, as necessary)

Re'tsmn I 0-1,03t02 R trenc.1 NP 4 5 I3

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) V,lfy SCR number on all pages Page 9 VII.2 Changes to a Method of Evaluation (If the activity does not involve a method of evaluation, these questions are Z NOT APPLICABLE.)

YES NO QUESTION El E5 Does the activity use a revised or different method of evaluation for performing safety analyses than that described in a cask SAR?

0 El Does the activity use a revised or different method of evaluation for evaluating SSCs credited in safety analyses than that described in a cask SAR?

If any answer is YES, a 10 CFR 72.48 Evaluation is required. If both answers are NO describe the basis for the conclusion (attach additional discussion, as necessary):

VII.3 Tests or Experiments (If the activity is not a test or experiment, the questions in VII.3.a and VII.3.b are 0 NOT APPLICABLE.)

a. Answer these two questions first:

YES NO QUESTION 5 5] Is the proposed test or experiment bounded by other tests or experiments that are described in the cask ISFSI licensing basis?

0] E Are the SSCs affected by the proposed test or experiment isolated from the cask(s) or ISFSI facility?

If the answer to both questions is NO continue to VII.3.b. If the answer to EITHER question is YES, then briefly describe the basis.

b. Answer these additional questions ONLY for tests or experiments which do not meet the criteria given in VII.3.a above.

If the answer to either question in VII.3.a is YES, then these three questions are E] NOT APPLICABLE:

YES NO QUESTION

[I El Does the activity utilize or control an SSC in a manner that is outside the reference bounds of the design bases as described in the ISFSI licensing basis?

5 [] Does the activity utilize or control a plant. cask or ISFSI facility SSC in a manner that is inconsistent with the analyses or descriptions in the ISFSI licensing basis?

0 E5 Does the activity place the cask or ISFSI facility in a condition not previously evaluated or that could affect the capability of a plant. cask, or ISFSI SSC to perform its intended functions?

If any answer in VII.3.b is YES, a 10 CFR 72.48 Evaluation is required. If the answers are all NO, describe the basis for the conclusion (attach additional discussion as necessary):

Rvitoon I I)4,0)3,fl2 I,.'Ln.. \I'

Point Beach Nuclear Plant SCR 2002-0359 10 CFR 50.59/72.48 SCREENING (NEW RULE) Verify SCR number on all page Page 10 PART VIII - DOCUMENT THE CONCLUSION OF THE 10 CFR 72.48 SCREENING Check all that apply:.

A 10 CFR 72.48 Evaluation is [] required or [0 NOT required. Obtain a screening number and provide the original to Records Management regardless of the conclusion of the 50.59 or 72.48 screening.

A VSC-24 cask Safety Analysis Report change is [] required or 0 NOT required. If a VSC-24 cask SAR change is required, then contact the Point Beach Dry Fuel Storage group supervisor.

A Regulatory Commitment (CLB Commitment Database) change is E required or Z NOT required. If a Regulatory Commitment Change is required, initiate a-commitment change per NP 5.1.7.

A change to the VSC-24 10 CFR 72.212 Site Evaluation Report is E] required or 0 NOT required. If a VSC-24 10 CFR 72.212 Site Evaluation Report change is required, then contact the Point Beach Dry Fuel Storage group supervisor.

PBF-115L.

ReC~ferenc. N' 5!l Re- ibon I r)l,(32

AFW System B 3.7.5 B 3.7 PLANT SYSTEMS B 3.7.5 Auxiliary Feedwater (AFW) System BASES BACKGROUND The AFW System automatically supplies feedwater to the steam generators to remove decay heat from the Reactor Coolant System upon the loss of normal feedwater supply. The AFW pumps provide cooling water to the steam generator secondary side via connections to the main feedwater (MFW) piping inside containment. The steam generators function as a heat sink for core decay heat. The heat load is dissipated by releasing steam to the atmosphere from the steam generators via the main steam safety valves (MSSVs) (LCO 3.7.1) or atmospheric dump valves (LCO 3.7.4). Ifthe main condenser is available, steam may be released via the steam bypass valves and recirculated to the CST.

The AFW System consists of three independent pump systems; two motor driven AFW pumps which are shared between the two units, and one dedicated steam turbine driven pump per unit. Each motor driven pump is capable of providing 100% of the design AFW flow rate, while the turbine driven pump is capable of providing 200% of the design flowrate. Each pump is provided with a recirculation line to maintain pump discharge flow above the minimum required flow rate for pump cooling. The recirculation lines from each pump connect to a single header. The header is aligned to a Condensate Storage Tank (CST) and is the normal flow path for minimum recirculation flow. Each AFW pump system can be manually aligned to take suction from the service water system. The normal source of water for the AFW pumps is the CST and the safety related supply is the Service Water (SW) System.

Motor operated valves are provided to allow the suction supply for the AFW pumps to be manually transferred to the SW system. For an AFW pump system to be considered OPERABLE, its associated service water suction supply valve must be operable. CST low level alarms and AFW pump low suction pressure alarms and trips are provided to alert personnel that the AFW pump suction supply must be manually swapped.

Each motor driven AFW pump is powered from an independent safeguards power supply and feeds one steam generator in each unit.

AFW pump P-38A supplies AFW flow to the Unit 1 and Unit 2 A steam generators, while AFW pump P-38B supplies the Unit 1 and Unit 2 B steam generators. Each motor driven AFW pump's discharge header contains two normally closed automatic motor operated valves. Upon receipt of an AFW actuation signal, the discharge valve associated with the affected unit receives an automatic open signal and the discharge 9/XXIO2 Beach Point Beach Point B 3.7.5-1 B 3.7.5-1 9/=)02

AFW System B 3.7.5 BASES BACKGROUND valve associated with the unaffected unit receives an automatic close (continued) signal. This feature will ensure that 100% of the motor driven AFW pump flow will be delivered to the affected unit, thereby, assuring that the accident analysis flowrates are met. Each motor driven AFW pump is also equipped with a backpressure control valve, which is designed to preclude the motor driven AFW pump from tripping on an overcurrent condition at low steam generator pressures.

The motor driven AFW pump systems actuate automatically on steam generator water level (low-low) and upon receipt of an safety injection (SI) signal. If offsite power is available, the motor driven AFW pump systems actuate immediately. If offsite power is not available, the safeguards buses shed their normal operating loads and are connected to the emergency diesel generators (EDGs). The motor driven AFW pump systems are then actuated per their programmed time sequence.

While not credited in any DBA analysis, the motor driven AFW pump systems also actuate on; a trip of all MFW pumps, and by the Anticipated Transient Without Scram Mitigating System Actuation Circuit.

Each unit's turbine driven AFW pump receives steam from both steam generator main steam lines upstream of the main steam isolation valves. Each of the two steam feed lines can supply 100% of the required steam flow to the turbine driven AFW pump. Both steam supply lines must be OPERABLE to consider the turbine driven AFW pump OPERABLE. All power-operated valves associated with the turbine driven AFW pump system are DC-powered, with the exception of the service water suction supply valve (Unit 1 and Unit 2 AF-4006) which is powered from a 480 Volt AC safeguards bus.

The turbine driven AFW pump system actuates automatically on a steam generator water level - low-low in both steam generators. While not credited in any DBA analysis, the turbine driven AFW pump system also actuates on; a trip of all MFW pumps, undervoltage on both main feedwater pump buses, and by the Anticipated Transient Without Scram Mitigating System Actuation Circuit.

The AFW System is capable of supplying feedwater to the steam generators during normal unit startup, shutdown, and hot standby conditions.

One pump at full flow is sufficient to remove decay heat and cool the unit to residual heat removal (RHR) entry conditions. Thus, the requirement for diversity in motive power sources for the AFW System is met.

B 3.7.5-2 l)J..JUZ Point Beach B 3.7.5-2 9/XX*/02

AFW System B 3.7.5 BASES BACKGROUND The AFW System is designed to supply sufficient water to the steam (continued) generator(s) to remove decay heat with steam generator pressure at the setpoint of the MSSVs. Subsequently, the AFW System supplies sufficient water to cool the unit to RHR entry conditions, with steam released through the ADVs.

The AFW System is discussed in the FSAR, Section 10.2 (Ref. 1).

APPLICABLE The AFW System mitigates the consequences of any event with loss of SAFETY ANALYSES normal feedwater.

The design basis of the AFW System is to supply water to the steam generator to remove decay heat and other residual heat by delivering at least the minimum required flow rate to the steam generators at pressures in excess of the steam generator safety valve set pressure.

In addition, the AFW System must supply enough makeup water to replace steam generator secondary inventory lost as the unit cools to MODE 4 conditions.

The AFW system is assumed to function in the mitigation of Design Basis Accidents (DBAs) and transients to include; Steam Generator Tube Rupture (SGTR), main steam line break, loss of normal feedwater, and loss of all AC power to the station auxiliaries. The AFW system must be capable of isolating AFW to the ruptured steam generator following a SGTR in addition to isolating the steam supply to turbine driven AFW pump associated with the ruptured steam generator. Although the AFW System will be initiated during the Small Break LOCA, the event has been analyzed with no credit for AFW. The Small Break LOCA was analyzed without AFW to be conservative and to limit the modeling required to address all possible combinations and time delays for various AFW system configurations.

The limiting Design Basis Accident (DBA) for the AFW System is the loss of normal feedwater event (Ref. 2).

The ESFAS automatically actuates the AFW turbine driven pump and associated power operated valves and controls when required to ensure an adequate feedwater supply to the steam generators during loss of power. DC power operated valves are provided for each AFW line to control the AFW flow to each steam generator.

The AFW System satisfies the requirements of Criterion 3 of the NRC Policy Statement.

9/XXIO2 Point Beach Point Beach BB3.7.5-3 3.7.5-3 91XX/02

AFW System B 3.7.5 BASES LCO This LCO provides assurance that the AFW System will perform its design safety function to mitigate the consequences of Design Basis Accidents and transients. Three AFW pump systems, consisting of two shared motor driven pump systems and one dedicated turbine driven pump system are required to be OPERABLE to ensure the availability of RHR capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two of the pumps from independent emergency buses. The third AFW pump is powered by a different means, a steam driven turbine supplied with steam from a source that is not isolated by closure of the MSIVs.

The AFW System is configured into three pump systems. The AFW System is considered OPERABLE when the components and flow paths required to provide redundant AFV flow to the steam generators are OPERABLE, a minimum recirculation flow path is OPERABLE, and the components required to manually transfer AFW pump suction supply to the service water system are OPERABLE. This requires that the two motor driven AFW pumps be OPERABLE, each capable of supplying AFW to a separate steam generator. The turbine driven AFW pump is required to be OPERABLE with redundant steam supplies from each main steam line upstream of the MSIVs, and shall be capable of supplying AFW to both of the steam generators. The piping, valves, instrumentation, and controls in the required flow paths also are required to be OPERABLE.

The LCO is modified by a Note indicating that only the motor driven AFW pumps which are associated with steam generators required to be operable for heat removal (per LCO 3.4.6) are required to be OPERABLE in MODE 4. This is because of the reduced heat removal requirements and short period of time in MODE 4 during which the AFW is required and the insufficient steam available in MODE 4 to power the turbine driven AFW pump.

APPLICABILITY In MODES 1, 2, and 3, the AFW System is required to be OPERABLE in the event that it is called upon to function when the MFWN is lost. In addition, the AFW System is required to supply enough makeup water to replace the steam generator secondary inventory, lost as the unit cools to MODE 4 conditions.

In MODE 4 the AFW System may be used for heat removal via the steam generators.

In MODE 5 or 6, the steam generators are not normally used for heat removal, and the AFW System is not required.

9IXX/02 Point Beach Point Beach B 3.7.5-4 B 3.7.5-4 9/X-XJ02

AFW System B 3.7.5 B 3.7 PLANT SYSTEMA T\ IAA _Zr,-

B 3.7.5 Auxiliary Feedwater (AFW) System BASES BACKGROUND The AFW System automatically supplies feedwater to the steam generators to remove decay heat from the Reactor Coolant System upon the loss of normal feedwater supply. The AFW pumps provide cooling water to the steam generator secondary side via connections to the main feedwater (MFW) piping inside containment. The steam generators function as a heat sink for core decay heat. The heat load is dissipated by releasing steam to the atmosphere from the steam generators via the main steam safety valves (MSSVs) (LCO 3.7.1) or atmospheric dump valves (LCO 3.7.4). Ifthe main condenser is available, steam may be released via the steam bypass valves and recirculated to the CST.

The AFW System consists of three independent pump systems; two motor driven AFW pumps which are shared between the two units, and one dedicated steam turbine driven pump per unit. Each motor driven S, I pump is capable of providing 100% of the design AFW flow rate, while

• "ej rec-,'? L,/*C-17, the turbine driven pump is capable of providing 200% of the design

,' e, r A Jflowrate. Each pump is provided with a recirculation line to maintain

/*scharge flow above the minimum required flow rate for pump C.*nn4..- coolin . Each AFW pump system can be manually aligned to take r

Ft1 S

/. suction from the service water system. The normal source of water for the AFW pumps is the-GEN . .. to .Te..*...aR) CtS,-and the safety related supply is the Service Water (SW) System. Motor operated valves are provided to allow the suction supply for the AFW pumps to A)

~ ,* *tc 1 *be manually transferred to the SW system. For an AFW pump system 7/

• to be considered OPERABLE, its associated service water suction J supply valve must be operable. CST low level alarms and AFW pump

• ,./*_.. 4d low suction pressure alarms and trips are provided to alert personnel Cne>" that the AFW pump suction supply must be manually swapped.

/-i *_ I(cs5a Each motor driven AFW pump is powered from an independent 71.5t -7OrC)-1 safeguards power supply and feeds one steam generator in each unit.

, egA

(/e,,. r- AFW pump P-38A supplies AFW flow to the Unit 1 and Unit 2 A steam

/A, j M 94,4- generators, while AFW pump P-38B supplies the Unit 1 and Unit 2 B steam generators. Each motor driven AF'W pump's discharge header contains two normally closed automatic motor operated valves. Upon receipt of an AFW actuation signal, tthe discharge valve associated with the affected unit receives an automatic open signal and the discharge F lve associated with the unaffected unit receives an automatic close signal. This feature will ensure that 100% of the motor'driven AFWN 4, 4, (j _" pump flow will be delivered to the affected unit, thereby, assuring that Point Beach B 3.7.5-1 Unit 1 - Amend--ntNVC01

.- 'i-U ,-'-endmnent No. 206

AFW System B 3.7.5 tE!g4- r C:, e~ cJW..~

BASES !P BACKGROUND the accident analysis flowrates are met. Each motor driven AFW pump (continued) is also equipped with a backpressure control valve, which is designed to preclude the motor driven AFW pump from tripping on an overcurrent condition at low steam generator pressures.

The motor driven AFW pump systems actuate automatically on steam generator water level (low-low) and upon receipt of an safety injection (SI) signal. If offsite power is available, the motor driven AFW pump systems actuate immediately. If offsite power is not available, the safeguards buses shed their normal operating loads and are connected to the emergency diesel generators (EDGs). The motor driven AFW pump systems are then actuated per their programmed time sequence.

While not credited in any DBA analysis, the motor driven AFW pump systems also actuate on; a trip of all MFW pumps, and by the Anticipated Transient Without Scram Mitigating System Actuation Circuit.

Each unit's turbine driven AFW pump receives steam from both steam generator main steam lines upstream of the main steam isolation valves. Each of the two steam feed lines can supply 100% of the required steam flow to the turbine driven AFW pump. Both steam supply lines must be OPERABLE to consider the turbine driven AFW pump OPERABLE. All power-operated valves associated with the turbine driven AFW pump system are DC-powered, with the exception of the service water suction supply valve (Unit 1 and Unit 2 AF-4006) which 's powered from a 480 Volt AC safeguards bus.

The turbine driven AFW pump system actuates automatically on a steam generator water level - low-low in both steam generators. While not credited in any DBA analysis, the turbine driven AFW pump system also actuates on; a trip of all MFW pumps, undervoltage on both main feedwater pump buses, and by the Anticipated Transient Without Scram Mitigating System Actuation Circuit.

The AFW System is capable of supplying feedwater to the steam generators during normal unit startup, shutdown, and hot standby conditions.

One pump at full flow is sufficient to remove decay heat and cool the unit to residual heat removal (RHR) entry conditions. Thus, the requirement for diversity in motive power sources for the AFW System is met.

r ' "-The AW System is designed to supply sufficient water to the steam generator(s) to remove decay heat with steam generator pressure at the setpoint of the MSSVs. Subsequently, the AFIA System supplies Point Beach B 3.7.5-2 Unit 1 - Amen t~o*ie

_" / t-2--Amendment No. 206

AFW System B 3.7.5 BASES I BACKGROUND su~cient water to cool the unit to RHR entry conditions, with steam (continued) released through the ADVs.

The AFW System is discussed in the FSAR, Section 10.2 (Ref. 1).

APPLICABLE The AFW System mitigates the consequences of any event with loss of SAFETY ANALYSES normal feedwater.

The design basis of the AFW System is to supply water to the steam generator to remove decay heat and other residual heat by delivering at least the minimum required flow rate to the steam generators at pressures in excess of the steam generator safety valve set pressure.

In addition, the AFW System must supply enough makeup water to replace steam generator secondary inventory lost as the unit cools to MODE 4 conditions.

The AFW system is assumed to function in the mitigation of Design Basis Accidents (DBAs) and transients to include; Steam Generator Tube Rupture (SGTR), main steam line break, loss of normal feedwater, and loss of all AC power to the station auxiliaries. The AFW system must be capable of isolating AFW to the ruptured steam generator following a SGTR in addition to isolating the steam supply to turbine driven AFW pump associated with the ruptured steam generator. Although the AFW System will be initiated during the Small Break LOCA, the event has been analyzed with no credit for AFW. The Small Break LOCA was analyzed without AFW to be conservative and to limit the modeling required to address all possible combinations and time delays for various AFW system configurations.

The limiting Design Basis Accident (DBA) for the AFW System is the loss of normal feedwater event (Ref. 2).

The ESFAS automatically actuates the AFW turbine driven pump and associated power operated valves and controls when required to ensure an adequate feedwater supply to the steam generators during loss of power. DC power operated valves are provided for each AFW line to control the AFW flow to each steam generator.

The AFW System satisfies the requirements of Criterion 3 of the NRC Policy Statement.

Point Beach B 3.7.5-3 Unit 1 -AmendmenL0

• i Unit endment No. 206

AFW System B 3.7.5 BASES LCO This LCO provides assurance that the AFW System will perform its design safety function to mitigate the consequences of Design Basis Accidents and transients. Three AFW pump systems, consisting of two shared motor driven pump systems and one dedicated turbine driven pump system are. required to be OPERABLE to ensure the availability of RHR capability for all events accompanied by a loss of offsite power and a single failure. This is accomplished by powering two of the pumps fromindependent emergency buses. The third AFW pump is powered by a different means, a steam driven turbine supplied with steam from a source that is not isolated by closure of the MSIVs.

The AFW System is configured into three pump systems. The AFW System is considered OPERABLE when the components and flow a . aths required to provide redundant AFW flow to the steam generators re -c

rc4 /a/n are OPERABLEjnd the components required to manually transfer Ax, , AFW pump suction supply to the service water system are OPERABLE.

This requires that the two motor driven AFW pumps be OPERABLE, each capable driven of supplying turbine AFW pump isAFW to a separate steam generator. The required to be OPERABLE with redundant steam supplies from each main steam line upstream of the MSIVs, and shall be capable of supplying AFW to both of the steam generators.

The piping, valves, instrumentation, and controls in the required flow paths also are required to be OPERABLE. .

The LCO is modified by a Note indicating that only the motor driven AFW pumps which are associated with steam generators required to be operable for heat removal (per LCO 3.4.6) are required to be OPERABLE in MODE 4. This is because of the reduced heat removal requirements and short period of time in MODE 4 during which the AFW is required and the insufficient steam available in MODE 4 to power the turbine driven AFW pump.

APPLICABILITY In MODES 1, 2, and 3, the AFW System is required to be OPERABLE in the event that it is called upon to function when the MFW is lost. In addition, the AFW System is required to supply enough makeup water to replace the steam generator secondary inventory, lost as the unit cools to MODE 4 conditions.

In MODE 4 the AFW System may be used for heat removal via the steam generators.

In MODE 5 or 6, the steam generators are not normally used for heat removal, and the AFW System is not required.

Point Beach B 3.7.5-4 Unit - AmendmegaW-I

. -.i 2--Amfendment Nc. 206