Text

Amends 95 & 95 to Licenses NPF-37 & NPF-66,respectively, Changing TS 3/4.7.5, UHS & Associated Bases to Support SG Replacement & Incorporate Recent UHS Design Evaluations
	ML20198B569
Person / Time
Site:	Byron
Issue date:	12/12/1997
From:	Dick G; Office of Nuclear Reactor Regulation
To:	;
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ML20198B574	List: ML20198B569;
References
	NPF-37-A-095, NPF-66-A-095 NUDOCS 9801070005
	Download: ML20198B569 (12)
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COMMONWEALTH EDISON COMPANY QQCKET NO. STN 50-454 BYRON STATION. UNIT NO,j AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 95 Ucense No. NPF-37 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by Commonwealth Edison Company (the licensee) dated May 6,1997, as supplemented July 30,1997, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act) and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.

There is reasonable assurance (i) that the activitl6. authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conduded in compliance with the Commission's regulations; D.

The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.

The issuance of this ar.tendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.

2.

Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating License No. NPF 37 is hereby amended to read as follows:

l 9901070000 971212 POR ADOCK 05000454 P

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InchnicaLBoecifications The Technical Specifications contained in Appendix A as revised through Amendment No. 95 and the Environmental Protection Plan contained in Appendix B, b0th of which are attached hereto, are hereby incorporated into this license, i

The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

This license amendment is effective as of the date of He issuance and shall be implemented within 30 days.

FOR THE NUCLEAR REGUL.ATORY COMMISSION j

Jm Wh Goos 6e F. Dick, Jr., Senior Project Manager Project Directorate ill 2 t

Division of Reactor Projects lil/IV Omca of Nuclear Reactor Regulation.

Attachment:

Changes to the Technical Specifications Date of lasuance:

Dec aber 12, 1997 i

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UNITED STATES

,j NUCLEAR REGULATORY COMMISSION s*

WASHINGTON. D.C. 30MH001 5.,..... /..

COMMONWEALTH EDISON COMPANY i

DOCKET No. STN 50455 BYRON STATION. UNIT NO. 2 1

AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.95 Ucense No. NPF 66 1.

The Nuclear Regulatory Commission (the Commission) has found that:

A.

The application for amendment by Commonwealth Edison Company (the licensee) dated May 6,1997, as supplemented July 30,1997, cornies with the standards and requiraments of the Atomic Energy Act of 1954, as amended (the Act) and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.

The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations nf the Commission; C.

There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.

The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.

The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.

2.

Accordingly, the license is amended by changes to the Technical Specifications as adicated in the attachment to this license amendment, and paragraph 2.C.(2) of Facility Operating Ucense No. NPF 66 is hereby amended to read as follows:

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(2).

Technical Boecifications The Technical Specmcations contained in Appendix A (NUREG-1113), as i

revised through Amendment No.95 and revised by Attachment 2 to NPF46, and i

the Environmental Protection Plan contained in Appendix B, both of which were attached to Lloense No. NPF 37, dated February 14,1985, are hereby i

incorporated into this license. Attachment 2 contains a revision to Appendix A which is hereby incorporated into this license. The licensee shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.

3.

This license amendment is effective as of the date of its issuance and shall be.

implemented within 30 dayc.

t FOR THE NUCLEAR REGULATORY COMMISSION

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l Go F. Dick, Jr.,

nlor Project Manager Project Directorate lil-2 Division of Reactor Projects - Ill/IV Office of Nuclear Reactor Regulation i

Attachment:

Changes to the Technical

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Specifcations Date of lasuance: December 12, 1997 r

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ATTACHMENT TO LICENSE AMENDMENT NOS. 95AND95.

FACILITY OPERATING L'OENSE NOS. NPF 37 AND NPF46 DOCKET NOS. STN 50-454 AND STN 50455 Revise the Appendix A Technical Specifications by removing the pages identified below and inserting the attached pages. The revised pages are identified by the captioned amendment number and contain marginal lines indicating the area of change.

1 Remove Pages inaarifagas 3/4713 3/4713 3/4714 3/4714 3/4 714a 3/4 714a 3/4715 3/4 7-15 8 3/4 7-3 8 3/4 7 3 B 3/4 7-4 B 3/4 7-4 B 3/4 7-da

PLANT SYSTEMS 3/4.7.5 ULTIMATE HEAT SINK LIMITING CONDITIONS FOR OPERATION

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3.7.5 The ultimate heat sink (VHS) shall be OPERABLE with:

a.

A water level in each of the UHS cooling tower basins of at least 60%,

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A total of at least 6 f.ns OPERABLE (high speed),

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c.

Two OPERABLE essent' service water makeup pumps, d.

An essential seryk water pump discharge temperature of 1

580'F, or 2

590*F, with 6 L.ERABLE fans running in high speed; or 3

596'F, with > 6 OPERABLE fans runn ng in high speed.

e.

Two OPERABLE UHS cooling tower basin level switches, f.

The National Weather Service (NWS) does not forecast the Rock River level to exceed 702.0 feet MSL, g.

Rock River water level greater than 670.6 feet MSL, and h.

The National Weather Service (NWS) has not issued a tornado watch that includes the Byron Site Area.

j APPLICABILITY:

MODES 1, 2, 3, and 4 ACTION:

a.

With a water level of less than 60% in either UHS cotting tower basin, restore the water level to at least 60% in each UHS cooling tower basin within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months or be in HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

b.

With only 5 fans OPERABLE, within I hour verify the 5 OPERABLE fans are capable of being powered by their respective emergency diesel generators. Restore at least 6 fans to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and COLD SH'JTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

BYRON - UNITS 1 & 2 3/4 7 AMENDMENT NO. 95

l Ll'11 TING CnMnlTION FOR OPERATION (Continued)

ACTION (Continued) j c.

With one essential service water makeup pump inoperable, within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months either:

1 1)

Restore the inoperable essential service water makeup pump to OPERABLE status,-or 2)

Verify that the same train deep well pump is OPERABLE with I

both UHS cooline tower basin levels 1 90%. Continue to verify both basin levels are 190% overy two hours and restore the inoperable essential service water makeup pump to OPERABLE status within *7 days.

This can be extended to 14 days for Essential Service Wate(*r Makeus pump i

inspection and extended maintenance during tto time when at least one unit is in MODE 5 or 6.) ble. provisions of The Specification 3.0.4 are not applica 3)

Otherwise be in at least NOT STAN08Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months

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and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

'd.

'elth t. e essential service water pump discharge water temperature

.ot metting the above requirement be in at least HOT STANDBY w.thinthenext6hoursandinCO[DSHUTDOWNwithinthefollowing 30 M es.

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)

With one UHS cooling tower basin switch inoperabl6:

a)

Restore the level switch to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or verify both basin levels are t 90% within the l

next hour and every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter. The provisions of Specification 3.0.4 are not applicable.

b)

Otherwise be in at least HOT STANDBY within the next G hours and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

2)

With both UHS cooling tower basin level switches inoperable:

a)

Restore one level switch to OPERABLE status within I hour and follow the provisions of 3.7.5.e.1 above or verifybothbasinlevelsare290%withinthenexf l

Specification 3.0.4 are not applicable, provisions of hour and every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter. The b)

Otherwise be in at least HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

3)

With any UHS cooling. tower basin level switch inoperable for more than 30 days, prepare and submit a special re> ort to the Commission pursuant to Specification 6.9.2 witiin the next 10 days outlining the cause of the inoperability and the plans for restoring the switch (es) to OPERABLE status, f.

With Rock River water level forecasted by NWS to exceed 702.0 feet MSL:

i l BYRON-UNITS 1f2 3/4 7-14 AMENDMENT N0. 95

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- LIMITING r untTION FOR DPERATION IContinued) i ACT10N (Continued) with bath UHS cooline tower basin levels h 90%ps are OPERABLE Within one hour verify that both deep well pum 1) and at least once i

every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter verify both bas'in levels are 190%.

The provisions of Speciflcation 3.0.4 are not applicable, j

well p ino>erable restore both deep well p s

Withonedee!tatuswSbotibasinlevelst90%beforetheRYk l

2) to OPERA 8LE River level exceeds 702 feet MSL or within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months , whichever i

comes first and follow provisions of ACTION f.1).

3)

Otherwise be in HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD i

SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

j gc With Rock River water level at or below 670.6 feet MSL within one hour verify Rock River level and flow, and:

1)

If Rock River level > 664.7 feet MSL and flow k 700 cfs verify 4

Rock River level > 664.7 feet MSL and flow 2 700 cfs every j

12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter. The provisions of Specification 3.0.4 are i

not applicable.

2)

If Rock River level $ 664.7 feet MSL or flow < 700 cfs, within-one hour:

a)

Verify that both deep well pumps are OPERABLE with both i

UHS cooling tower basin levels t 90% and at least once l

every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter verif9 both basin levels are rpplicable,provisionsofSpecihication3.0.4arenot l

j e 30%. The With one deep well pump inoperable within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months i

b) restorebothdoeswellfumpstoOPERABLEstatuswithboth basin levels t 9 4 and ollowprovisionsofACTIONg.2)a).

l c)

Otherwise be in at least HOT STANDBY within the next 6 1

hours and at least HOT SHUTDOWN within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and at least COLD SHUTDOWN within the subsequent 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months .

h)

With a tornado watch issued by NWS that includes Byron site trea:-

1)

.Within one hour verify that both deep well pumps are OPERABLE' with both UHS cooling tower basin levels k 90% and at least once every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months thereafter verify both basin levels 2 90%.

The provisions of Specificatio,n 3.0.4 are not applicable.

2)

With one deep well pump inoperable, within 30 minutes take

= action to restore both deep well pumps to OPERABLE status with both basin levels 2 90% and at least once every 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months l

thereafter, yetify both basin levels k 90%.

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3)

Otherwise be in HOT STANDBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months .

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i BYRON - UNITS 1 4 2-3/4 7-14a-AMENDMENT N0.95

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PLhMTSYSTEMS SURVEILLANCE REQUIREMENTS 4.7.5 The UHS shall be detemined OPERABLE at least once per:

f a.

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by verifying the water level in each UHS cooling tower i

basin to be greater than or equal to 60%,

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b.

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by verifying the essential service water pump discharge water temperature is within its limit, c.

24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by verifying that the Rock River water level is within its

limits, d.

31 days by starting from the control room each UHS cooling tower fan that is required to be OPEEALE and not already in high speed operation and operating each of those fans in high speed for'at least l

15 minutes, e.

31 days by 1)

Verifying that the fuel supply for each diesel powered essential service water makeup pump is at least 36% of the fuel supply tank volume, 2)

Starting the diesel from ambient conditions on a low basin level test signal and operating the diesel powered pump for at least 30 minutes, 3)

Verifying that each valve (manu.1, power operated, or automatic) in the flow path is in its correct position, 4)

Starting each deep well pump and operating it for at least i

15 minutes and verifying that each valve (manual, power-operated, or automatic) in the flow path ts in its correct

position, f.

92 days by verifying that a drain sample of diesel fuel from the fuel storage tank, obtained in accordance with ASTM D4057-1981, is within the acceptable limits specified in Table 1 of ASTM-D975-1977 when checked for viscosity, water, and sediment, g.

18 months by performing a CHANNEL CALIBRATION on each of the UHS cooling tower basin level switches, h.

18 months by subjecting each diesel that powers an essential service water makeup pump to an inspection in accordance with procedures prepared in conjunction with its manufacturer's rc ommendations for the class of service and by cycling each testable valve in the flow-path through at least-one complete cycle of full travel, i.

-18 months by verifying each deep well. pump will provide at least 550 gpa flow rate, and j.

18 months by visually inspecting and verifying no abnormal breakage or i

degradation of the fill materials in the UHS cooling tower.

BYRON.- UNITS 1 & 2 3/4 7-15 AMENDMENT NO.95

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PLANT SYSTEMS BASES 3/4.7.1.5 MAIN STEAM LINE ISOLATION VALVES The OPERABILITY of the main steam line isolation valves ensures that no more than one steam generator will blowdown in the event of a steam line rupture. This restriction is required to: (1) minimize the positive reactivity effects of the Reactor Coolant System cooldown associated with the blowdown, and (2) limit the pressure rise within containment in the event the steam line rupture occurs within containment.

The OPERABILITY of the main steam isolation valves within the closure times of the Surveillance Requirements are consistent with the assumptions used in the safety analyses.

3/4.7.2 STEAM GENERATOR PRESSURE / TEMPERATURE LIMITATION The limitation on steam generator pressure and temperature ensures that the pressure-induced stresses in the steam generators do not exceed the maximum allowable fracture toughness stress limits. The limitations of 70*F of 60'F and are sufficient and 200 psig are based on a steam generator RTm to prevent brittle fracture.

3/4.7.3 COMPONENT COOLING WATER SYSTEM The OPERABILITY of the Component Cooling Water System ensures that sufficient cooling capacity is available for continued operation of safety-related equipment during normal and accident conditions. The redundant cooiing c6pacity of this system, assuming a single failure, is consistent with the assumptions used in the safety aralyses.

3/4.7.4 ESSENTIAL SERVICE WATER SYSTEM The OPERABILITY of the Essential Service Water System ensures that sufficient cooling capacity is available for continued operation of safety-related equipment during normal and accident conditions. The redundant 1

cooling capacity of this system, assuming a single failure, is consistent with the assumptions used in the accident conditions within acceptable limits.

The OPERABILITY of the unit crosstie along with the availability of an Essential Service Water pump in the shut down unit ensures the availability of sufficient redundant cooling capacity for the operating unit.

3/4.7.5 ULTIMATE HEAT SINK The limitations on the ultimate heat sink ensure 1) sufficient cooling capacity is available for continued operation of safety related equipment during normal and accident conditions and 2) adequate inventory is available to provide a 30-day cooling water supply to safety related equipment.

The i

limiting design basis event for the UNS basin temperature is a loss of coolant l

accident coincident with a loss of offsite power on one unit, in conjunction with the non-accident unit proceeding to an orderly shutdown and cooldown from BYRON - UNITS 1 & 2 B 3/4 7-3 AMENDMENT NO. 95

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PLM'T SYSTEMS BASES ULTIMATE HEAT SINK (Continued) l maximum power to Mode 5, assuming a single active failure. The limiting design basis event for the VHS makeup is a two unit trip from full power, i

supply source.gle active failure and loss of the norwal auxiliary feedwater assuming a sin The minimum UHS cooli tower basin water level and the service water pumpdischargetemperaturehmitsassurethatadequatethernalcapacityis l

available in the SX water inventory to absorb the initial accident heat input.

Dependireg on basin temperature, six or more fans are required to be available or running 50 that the required number of fans are available after a single

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active failure to assure basin temwrature will remain less than 100'F. SX basin temperature and SX pump disc 1arge tem xrature are essentially the same since the piping from the tower basins to tie pumps is underground and the temperature increase across the SX pump at accident flow rates is negligible.

Temperature is measured at the discharge of each SX pump.

The VHS cooling tower basin invento is available for transporting heat from safety related equipment duririg norma and accident conditions. Due to evaporation, blowdown, and auxiliary feedwater supply the basin inventory alone is not adequate for the required 30 day cooling water supply, therefore makeup systems are provided to replenish the basin inventory.

The makeup systems are designed to provide adequate makeup for normal and accident conditions concurrent with the use of the essential service water system as the supply source for the auxiliary feedwater system, assuming a single active failere.

Adequate inventory is maintained by the SX makeup system that uses the Rock River as a water source. The SX r.akeup system is designed to withstand all design basis natural phenomena events and combination of events except for seismic events during low Rock River flow or level (loss of SX makeup pump A backup makeup system uses the dee suction), tornado, and river flood.

The deep well system is designed for seismic, p wells as a water source.

tornado, and river flood events.

Each essential service water makeup pump is powered by a diesel engine with a fuel supply adequate for approximately 3 days of operation.

Achievement of the design basis 30 day operation is dependent upon successful implementation of plant procedures to replenish the fuel supply following design basis events.

The operability requirements for the basin level switches Rock River level limitations, and tornado watch limitations assure that the SX makeup system is available to provide makeup water. The corresponding actMns assure that the backup deep well system is available and increases the minimum 4

BYRON. UNITS 1 & 2 B 3/4 7-4 AMENDMENT NO. 95

l PLANT SYSTEMS RASES ULTIMATE HEAT SINK (Continued) cooli N tower basin level to assure that adequate basin water inventory is available after a two hour delay to manually start the deep well pumps after j

an accident.

3/4.7.6 CONTROL ROOM VENTILATION SYSig The OPERABILITY of the Control Room Ventilation System ensures thatt (1) i the ambient air temperature does not exceed the allcwable temperature for i

continuous duty rating for the equipment and instrumentation cooled by this system, and (2) the control room will remain habitabir for operations ursonnel during r.nd following all credible accident conditions.

Operation of tte system with the heaters operating for at least 10 continuous hours in a 31-day period i

is-sufficient to reduce the buildup of moisture en the adsorbers and HEPA-

- filters. The OPERABILITY of this system in conjunction with control room I

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. BYRON!- UNITS 1 & 2 8 3/4 7-4a AMENDMENT NO. 95 l

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ML20198B569

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