LIC-02-0101, License Amendment Request, Steam and Feedwater Systems - Revision

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License Amendment Request, Steam and Feedwater Systems - Revision
ML022900040
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 10/08/2002
From: Bannister D
Omaha Public Power District
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
LIC-02-0101
Download: ML022900040 (9)
v • d • e


Text

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Am Omaha Pubhc Power D~stnct 444 South 16th Street Mall Omaha NE 68102-2247 October 8, 2002 LIC-02-0101 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555

References:

1.

Docket No. 50-285

2.

Letter from OPPD (R. T. Ridenoure) to NRC (Document Control Desk),

"Fort Calhoun Station Unit No. 1 License Amendment Request, Steam and Feedwater Systems," dated July 23, 2002 (LIC-02-0065)

SUBJECT:

Fort Calhoun Station Unit No. 1 License Amendment Request, "Steam and Feedwater Systems" - Revision Pursuant to 10 CFR 50.90, Omaha Public Power District (OPPD) hereby requests the following amendment to Fort Calhoun Station (FCS) Technical Specifications 2.5.

This proposed amendment will: (1) remove the requirement to demonstrate operability of redundant auxiliary feedwater system components, and (2) provide an allowed outage time to restore operability of the emergency feedwater storage tank. The changes requested in this letter supplement the application submitted in Reference 2.

r j This submittal revises the total completion time for Technical Specification 2.5.1.A, auxiliary feedwater turbine steam supply, from ten days to eight days. The proposed completion time now agrees with the assumptions used in the improved technical specifications, NUREG 1432. contains replacement pages for the Technical Specification and Basis changes requested in Reference 2. contains replacement pages for the clean version reflecting the requested Technical Specification and Basis changes.

The basis and conclusions reached in the Discussion, Justification and No significant Hazards Consideration provided in the July 23, 2002 submittal (Reference 2) remain valid and therefore are not resubmitted.

OPPD requests approval of the proposed amendment by January 15, 2003 and 120 days to implement this amendment. No commitments are made to the NRC in this letter.

I declare under penalty of perjury that the foregoing is true and correct. (Executed on October 8, 2002)

Employment with Equal Opportunity 4171

U. S. Nuclear Regulatory Commission LIC-02-0101 Page 2 If you have any questions or require additional information, please contact Dr. R. L. Jaworski at (402) 533-6833.

Sincerely, D. J. Bannister Manager -Fort Calhoun Station DJB/RRL/rrl Attachments:

1. Replacement pages for the Markup of Technical Specification Pages
2. Replacement pages for the Proposed Technical Specification Pages c:

E. W. Merschoff, NRC Regional Administrator, Region IV A. B. Wang, NRC Project Manager J. G. Kramer, NRC Senior Resident Inspector Division Administrator - Public Health Assurance, State of Nebraska Winston & Strawn

LIC-02-0101 Page 1 ATTACHMENT 1 Replacement pages for the Markup of Technical Specification Pages

TECHNICAL SPECIFICATIONS 2.0 LIMITING CONDITIONS FOR OPERATION 2.5 Steam and Feedwater Systems Applicability W~hen steam generators are PNhen heating the reactor coolant above 3600F the steam driven auxiliary feedwa gnly reqtired tobeOPERAi LE prior to makin, the reactor critical.

Objective To define certain conditions for the steam and feedwater system necessary to assure adequate decay heat removal.

Specifications 02atOghl~adal RS0 A mTiiwmo oAF5W tra allontbeOPERABLEwihn The imserabeny ufeedwater storagetand With one steam supply to the turbine driven AFW pump inoperable, restore the steav supply to OPERABLE status within 7 days and within 8 days from discovery of failure o meet the LCO. The oto P

drAi':n 44Auxiliary;; fi;;dw't@P "p;,-i;i o"Perable. The rA=1t W:Yith one AFW -train inprbef-or -rea'sons 'other thani condition A, restore the AFW`

rain to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.__________________

Plf the required action and associated completion times of condition A or B are not met,

ýhen the unit shall be placed in MODE 2 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in MODE 3 in the'next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, I nd.less than 300OF without reliance on'the steam-ci-eatr-o e

heat remova'l

  • ithin the next 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />!__----__---------____-_------___-_----_

With both AFW trains Inoperable, then initiate actions to restore one AFW train to PERABLE status immediately. Technical Specification (TS) 2.0.1 and all TS actFio-ns equiring MODE changies are, suspended until one AFW train is restored to PERABLE status!________________________

2'

-The~notor driven train is requ6ire-d to be OPERABLE when T~,,d is below 300 F a'n-dth-e se-an generators are relied upon for heat removal. With the motor driven AFW train inpr~jje nitiate actions to restore one'AFW train.to OPERABLE status immediately, Technical pecification (TS) 2.0.1 and all TS 'actions regiig OEcane r supneuion FW raiOnis restored ýtoOPýERABýLE status r~i5 A minimum of 55,000 gallons of water in the emergency feedwater storage tankjkEFWST) and a backup water supply to the emergency feedwater storage tank shall be avial.LYih-h

TECHNICAL SPECIFICATIONS

( FWST inoperable, verify operabiity of the backup water supply within four hours and cnce D er 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter, and restore the EFWSTm to OPERABLE srays wthin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. If h hese action requirements cannot be satisfied, then thenit sham bypaceds n at least MOer within 6 hour6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />s-, and less than 300t F without reliance Iaon the steamil

.N tors foy t

ecay heat t emoval withinethe next 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />!

(4)

The main steam stop valves are ~p~beOPERABLE when T~ Id s above 300_F and capable of closing in four seconds or less under no-flow conditions.

Basis A reactor shutdown from power requires a removal of core decay heat. Immediate decay heat removal requirements are normally satisfied by the steam bypass to the condenser.

Therefore, core decay heat can be continuously dissipated via the steam bypass to the condenser as long as feedwater to the steam generator is available. Normally, the capability to supply feedwater to the steam generators is provided by operation of the turbine cycle feedwater system. 'In the unlikely event of complete loss of electrical power to the station, decay heat removal is by steam discharge to the atmosphere via the main steam safety and atmospheric dump valves. Either auxiliary feed pump Amendment No. 4,12;-.,46 2-28

TECHNICAL SPECIFICATIONS 2.0 LIMITING CONDITIONS FOR OPERATION 2.5 Steam and Feedwater Systems can supply sufficient feedwater for removal of decay heat from the plant. Technical peciicaton 21-

'establis ýh-es hei'he steaim generators are required for heat removal' ach train, includes the pump, piping, instruments, and controls to ensure the availability of n OPERABLE flow path capable of taking sucztilon'from the EFWST and delivering, 'water to

he steam generators. The eight day completion time for 2.5(1)A provides a limit on the'

-aximurn time allowed for any combination of conditions to be inoperable during any) 1ontinuous~ failure to meet the LCO.X With, one of the required AFW trains inoperable, actions

-ust be taken to.restore' OPERABLE st atus within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

~With,~ no AFWV trains' PERABLE'the unit' is in a seriously degraded condition with no' saeatyrelated means for,

-onducting,,oold own, and only limited means for conducting co~odown with nonsafety

ýrade equipmient. 'In such a condition the unit should not be pegurbed by. an action,ý

ýncluding a power change, that mig~ht 'result in atrp The minimum amount of water in the emergency feedwater storage tank is the amount needed for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of such operation. The tank can be resupplied with water from the raw water system.0')

A closure time of 4 seconds for the main steam stop valves is considered adequate time and was selected as being consistent with expected response time for instrumentation as detailed in the steam line break analysis. (2 )(3)

References (1)

USAR, Section 9.4.6 (2)

USAR, Section 10.3 (3)

USAR, Section 14.12 2-29 Amendment No..

Fwbtesst 11,2m.Q

LIC-02-0101 Page 1 ATTACHMENT 2 Replacement pages for the Proposed Technical Specification Pages

TECHNICAL SPECIFICATIONS 2.0 LIMITING CONDITIONS FOR OPERATION 2.5 Steam and Feedwater Systems Applicability When the steam generators are relied upon for reactor coolant system heat removal.

NOTE:

When heating the reactor coolant above 300OF the steam driven auxiliary feedwater (AFW) pump is only required to be OPERABLE prior to making the reactor critical.

Objective To define certain conditions for the steam and feedwater system necessary to assure adequate decay heat removal.

Specifications (1)

Two AFW trains shall be OPERABLE when TcoId is above 300'F.

A. With one steam supply to the turbine driven AFW pump inoperable, restore the steam supply to OPERABLE status within 7 days and within 8 days from discovery of failure to meet the LCO.

B. With one AFW train inoperable for reasons other than condition A, restore AFW train to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.

C. If the required action and associated completion times of condition A or B are not met, then the unit shall be placed in MODE 2 in 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in MODE 3 in the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and less than 300°F without reliance on the steam generators for decay heat removal within the next 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />.

D. With both AFW trains inoperable, then initiate actions to restore one AFW train to OPERABLE status immediately. Technical Specification (TS) 2.0.1 and all TS actions requiring MODE changes are suspended until one AFW train is restored to OPERABLE status.

(2)

The motor driven train is required to be OPERABLE when Tc0Id is below 300'F and the steam generators are relied upon for heat removal. With the motor driven AFW train inoperable, then initiate actions to restore one AFW train to OPERABLE status immediately. Technical Specification (TS) 2.0.1 and all TS actions requiring MODE changes are suspended until one AFW train is restored to OPERABLE status.

(3)

A minimum of 55,000 gallons of water in the emergency feedwater storage tank (EFWST) and a backup water supply to the emergency feedwater storage tank shall be available. With the EFWST inoperable verify operability of the backup water supply within four hours and once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter, and restore the EFWST to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. If these action requirements cannot be satisfied, then the unit shall be placed in at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and less than 300°F without reliance on the steam generators for decay heat removal within the next 18 hours2.083333e-4 days <br />0.005 hours <br />2.97619e-5 weeks <br />6.849e-6 months <br />.

(4)

The main steam stop valves are OPERABLE when Tcld is above 300°F and capable of closing in four seconds or less under no-flow conditions.

Amendment No. 4 2-28

TECHNICAL SPECIFICATIONS 2.0 LIMITING CONDITIONS FOR OPERATION 2.5 Steam and Feedwater Systems Basis A reactor shutdown from power requires a removal of core decay heat. Immediate decay heat removal requirements are normally satisfied by the steam bypass to the condenser.

Therefore, core decay heat can be continuously dissipated via the steam bypass to the condenser as long as feedwater to the steam generator is available. Normally, the capability to supply feedwater to the steam generators is provided by operation of the turbine cycle feedwater system. In the unlikely event of complete loss of electrical power to the station, decay heat removal is by steam discharge to the atmosphere via the main steam safety and atmospheric dump valves.

Either auxiliary feed pump can supply sufficient feedwater for removal of decay heat from the plant. Technical Specification 2.1.1 establishes when the steam generators are required for heat removal.

Each train includes the pump, piping, instruments, and controls to ensure the availability of an OPERABLE flow path capable of taking suction from the EFWST and delivering water to the steam generators. The eight day completion time for 2.5(1)A provides a limit on the maximum time allowed for any combination of conditions to be inoperable during any continuous failure to meet the LCO.

With one of the required AFW trains inoperable, actions must be taken to restore OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. With no AFW trains OPERABLE the unit is in a seriously degraded condition with no safety related means for conducting a cooldown, and only limited means for conducting cooldown with nonsafety grade equipment.

In such a condition the unit should not be perturbed by any action, including a power change, that might result in a trip.

The minimum amount of water in the emergency feedwater storage tank is the amount needed for 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of such operation. The tank can be resupplied with water from the raw water system.01 )

A closure time of 4 seconds for the main steam stop valves is considered adequate time and was selected as being consistent with expected response time for instrumentation as detailed in the steam line break analysis.(2)(3)

References (1)

USAR, Section 9.4.6 (2)

USAR, Section 10.3 (3)

USAR, Section 14.12 Amendment No. 42.

2-29

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