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Proposed Tech Specs Increasing Unit 2 Boron Concentrations for RWST & ECCS Accumulators
	ML20063H740
Person / Time
Site:	Comanche Peak
Issue date:	02/14/1994
From:	; TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC)
To:	;
Shared Package
ML20063H736	List: ML20063H732; ML20063H740;
References
	NUDOCS 9402220166
	Download: ML20063H740 (10)
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ATTACHMENT 3 to TXX-94007 AFFECTED TECHNICAL SPECIFICATION PAGES (NUREG - 1468)

PAGES 3/4 1-11, 3/4 1-13, 3/4 5-1, 3/4 5-10, 3/4 9-1, B3/4 1-2, B3/4 1-3, B3/4 5-2 and B3/4 9-1 1

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9402220166 940214 PDR ADOCK 05000445 4, P PDR u i

, IAttachment 3 to TXX-94007

Page 1.of 9 REACTIVITY CONTROL SYSTEMS I BORATED IdATER SOURCE - SHUTDOWN LIMITING Col Ir10n r0R OprRATI0n 3.1.2.5 As a minimum, one of the following borated water sources shall be OPERABLE:

a. A boric acid storage tank with:

1) A minimum indicated borated water level of 10% when using the boric acid transfer pump,

2) A minimum indicated borated water level of 20% when using the gravity feed cannection,

3) A minimum boron concentration of 7000 ppe, and ,

4) A minimum solution _ temperature of 65'F. I

b. The refueling water storage tank (RWST) with: l

1) A minimum indicated borated water level of 24%, !

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2) A minimum bo on concentration of 2400 ppm (for Unit 1 (2000 ppp

@rUnit2, nd

3) A minimum solution temperature of 40*F.

APPLICABILITY: MODES 5 and 6.

ACTION:

With no borated water source OPERABLE, suspend all operations involving CORE ALTERATIONS or positive reactivity changes.

L COMANCHE PEAK - UNITS 1 AND 2 3/4 1-11 Unit.1 - Amendment No.19 Unit 2 - Amendment No. 5 4-i

Attachment 3 to TXX-94007 l Pacje 2 of 9 i

REACTIVITY CONTROLSYSTEMS j BORATED WATER SOURCES - OPERATING LIMITING ColelTION FOR OPERATION

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3.1.2.6 As a minimum, the following borated water source (s) shall be OPERABLE

as required by Specification 3.1.2.2

a. A boric acid storage tank with: ,

1) A minimum indicated borated water level of 505, j 2) A minimum boron concentration of 7000 ppe, and

! 3) A minimum. solution temperature of 65'F.

b. The refueling water storage tank'(RWST) with: l l 1) A minimum indicated borated water level of 95%,

2) A boroo concentration between 2400 DDR "r.it I (2000 ;;;

j and 2600 p@(f;r '#,it -(22^^ ;-- far unu 7 1

3) A minimum solution temperature t,f 40*F,'and l ,

4) A maximum solution temperature of 120*F.

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APPLICABILITY: MODES 1, 2, 3, and 4.

l ACTION:

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a. With the boric acid storage tank inoperable and being used.as one of the above required borated water sources, restore the tank 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 borated to a SHUTDOWN MARGIN equivalent to at least 1.3% Ak/k at 200*F; restore the boric acid storage tank to 3

! OPERABLE status within the next 7 days or be in COLD SHUTDOWN within i i the next 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months . 1 i

b. With the RWST inoperable, restore the tank to OPERABLE status igithin I hour 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 in COLD SHUTDOWN within the following 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , l

COMANCHE PEAK - UNITS 1 AND 2 3/4 1-13 Unit 1 - Amendment No. 6,19 Unit 2 - Amendment No. 5-

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Attachment 3 to TXX-94007 Page 3 of 9 3/4:5 EMERGENCY CORE COOLING SYSTEMS 3/4.5.1 ACCLBtJLATORS COLD LEG IR3ECTION LIMITING CONDITION FOR OPERATION 3.5.1 Each cold leg injection accumulator shall be OPERABLE with:

a. The discharge isolation valve open with power removed, AM l b.

An indicated borated water' level LE of between A

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c. A boran concentration of between 2300 ppe(fer "-it ! (1900 pp- S !

g nit 2))and 2600 ppe @ r Ur.it 1 (22"" ;;e -- 3r.1

),and j;

d. An indicated cover-pressure of between 623 and 644 psig. 1 APPLICABILITY: MODES 1, 2, and 3*.

ACTION:

a. With one cold leg injection accumulator inoperable, except as a result of a closed isolation valve or the baron concentration i outside the required values, restore the inoperable accumulator to OPERABLE status within I hour or be in at least H0T STANOBY within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and reduce pressurizer pressure to less than 1000 psig within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

b. With one cold leg injection accumulator inoperable due to .the -

isolation valve being closed, either immediately open the isolation valve or be in at least HOT STAND 8Y within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and reduce .

pressurizer pressure to less than 1000 psig within the following j 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

c. With the boron concentration of one cold leg injection accumulator outside the required limit, restore the boron' concentration to within the required limits within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or be in at least HOT .

STAND 8Y within the next 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and reduce pressurizer pressure to less than 1000 psig within the following 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months .

SURVEILLANtf REQUIRENENTS 4.5.1.1 Eneb cold leg injection accumulator shall be demonstrated OPERABLE:

i a. At least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months by: !

1) Verifying the indicated borated water level and nitrogen cover-j pressure in the tanks, and l

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Pressurizer pressure above 1000 psig.

4 COMANCHE PEAK - UNITS 1 AND 2 3/4 5-1 Unit 1 - Amendment No. 19 4

Unit 2 - Amendment No. . .

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Attachment 3 to TXX-94007 l Page 4.of 9 l EMERGENCY CORE COOLING SYSTEMS !

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3/4.5.4 REFUELING WATER STORAGE TANK LIMITING COfSITION FOR OPERATION 3.5.4 The refueling water storage tank (RWST) shall be OPERABLE with:-

a. A minimum indicated borated water level of 955, )

b. A n concentration of between 2400 ppmN J ':it ! '2002' : f unit 2j and 2600 ppehf Wit I (??'= m - "-t! ay of boron,

c. A rinimum solution temperature of 40*F, and

d. A maximum solution temperature.of 120*F.

APPLICABILITY: MODES 1, 2, 3, and 4. ;

ACTION:

With the RWST inoperable, restore the tank to OPERACLE status within I hour or be in at least HOT STANDBY within 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 .

SURVEILLANCE REQUIREMENTS 4.5.4 The RWST shall be demonstrated OPERA 8LE:

a. At least once per 7 days by:

1) Verifying the indicated borated water volume in the tank, and ,

2) Verifying the boron concentration of the water.

b. At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by verifying the RWST temperature when >

the outside air temperature is less than 40*F or greater than 120*F.

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COMANCHE PEAK - UNITS 1 AND 2 3/4 5-10 Unit 1 - Amendment No.19:

Unit 2 - Amendment No. 5-s

.. .. _ - - - . - _ _ . . _ _ _ _ . . - . , - . _ _ - - . . ~ - . . - . - ~ _ - - - - - _ - .

Attachment 3 to TXX-94007 Aage 5 of 9

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3/4 9 REFUELIlHi OPERATIONS s 3/4.9.1 80 ROM CONCENTRATION QETING COMITION FOR OPERATION 3.9.1 The baron concentration of all filled portions of the Reactor Coolant System and the refueling canal shall be maintained uniform and sufficient.to ensure that the more restrictive of the following reactivity conditions is met; either:

a. A K ,, of 0.95 or less, or

b. A boron concentration of greater than or equal to 2400 ppa.hr "r.itI G ^^^ ;;; f - Unit 2 h Additionally, either valve CS-8455.or valves CS-8560, FCV-1118, CS-8439, CS-8441 and CS-8453 shall be closed and secured in position.

APPLICABILITY: N00E 6.

ACTION: 4

a. With the requirements a. or b. of the above not satisfied, immediately suspend all operations involving CORE ALTERATIONS or positive-reactivity changes and initiate and continue boration at greater than ;

or equal to 30 gpa of a solution containing greater than or equal to ;

7000 ppm boron or its equivalent until K equal to 0.95 or the boron concentration,p is is reduced restored totogreater less than thanor or equal to 2400 pps p i M t (E-- === rar Hait ?O whichever is l-the more restrictive. g

b. If either valve CS-8455 or valves CS-8560, FCV-IllB, CS-8439, CS-8441 and CS-8453 are not closed and secured in position,'isomediately '

suspend all operations involving CORE' ALTERATIONS or positive-reactivity changes and take action to isolate the dilution paths.

Within I hour, verify the more restrictive of 3.9.1.a or 3.9.1.b or J

carry out Action a. above.

SURVEILLANCE RE0UIRENENTS 4.9.1.1 The more restrictive of the above two reactivity conditions shall be determined prior to:

a. Removing or unbolting the reactor vessel head, and

b. Withdrawal of any control rod in excess of 3 feet from its fully inserted position within the reactor vessel.

4.9.1.2 The heron concentration of the Reactor Coolant System and the refueling canal shall-he determined by chemical analysis at least once per 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

4.9.1.3 Either valve CS-8455 or valves CS-8560, FCV-IllB, CS-8439, CS-8441 and CS-8453 shall be verified closed and secured in position by mechanical stops or by removal of air or electrical power at least once per 31 days to verify that dilution paths are isolated.

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- During initial fuel load, the boron concentration limitation for the refueling canal is not applicable provided the refueling canal level is verified to be below the reactor vessel flange elevation at east once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months .

COMANCHE PEAK - UNITS 1 AND 2 3/4 9-1 Unit 1 - Amendment No. 44,19 Unit 2 - Amendment No.~5'

Attachment 3 to TXX-94007 j Page"6 of 9 3

i i REACTIVITY CONTROL SYSTEMS

I i J j BASES l

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! MODERATOR TEMPERATURE C0 EFFICIENT (Continued) j involved subtracting the incremental change in the EC associated'ith w a core I

condition of all rods inserted (most positive MDC) to an all rods withdrawn. -i condition and, a conversion for the rate of change of moderator density with- '

temperature at RATED THERMAL POWER conditions.

j This value of the MDC was then i transformed into the limiting End of Cycle Life (E0L) MTC value. The 300' ppa '

surveillance limit MTC value represents a conservative value (with corrections for burnup and soluble boron) at a core condition of 300 ppe equilibrium boron concentration and is obtained by making these corrections to-the limiting E0L MTC value.

l The Surveillance Requirements for measurement' of the MTC at the beginning j and near the end of the fuel cycle are adequate to confirm that the MTC remains i within its limits since this coefficient changes slowly due principally to the

{ reduction in RCS boron concentration associated with fuel burnup.

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3/4.1.1.4 MINIMUM TEMPERATURE FOR CRITICALITY This specification ensures that the reactor.will not be made critical with the Reactor Coolant System average temperature less than 551*F.s This limitation is required to ensure:' (1) the moderator temperature coefficient is within its j analyzed temperature range, operating range, (3) the pressurtzer (2) theistrip instrumentation is within its normal i

capable of being in an OPERABLE status with a steam bubble, and (4) the reactor vessel is above its minimum RT,-

temperature.

4 3/4.1.2 BORATION SYSTEMS l The Boron Injection System ensures that negative reactivity control is-j available during each mode of facility operation. . The components required.to j

perform this function include: -(1) borated water sources (2) charging pumps .

i (3) separate flow paths, 4) boric acid transfer pumps, an,d (5) an emergency ,

j power supply from 0PERABL diesel generators.

'k With the RCS average temperature above 200*F, a minimum of two baron injection flew paths are required to ensure single functional capability in the event an assmed failure renders one of the flow paths inoperable. The boration capability of either flow path is sufficient to provide a SHUTDOWN MARGIN from expected operating conditions of 1.6% e /k for Unit I (1.3% R /k for' Unit 2) after xenon decay and cooldown to 200*F. The maximum expected boration a capability requirement occurs at E0L from full power equilibrium xenon conditions and requires 15,700 gallons of 7000 ppm D rated water from the boric a id storage tanks or'70,702 gallons of 2400 ppe f r 5't , Z 3 ;;: hr Of A borated water from the refueling water storage tank (RETD.

COMANCHE PEAK - UNITS 1 AND 2 B 3/4 1-2 Unit 1 - Amendment No. 6,44,19 Unit 2 - Amendment No. 5 1 h I

Attachment 3 to TXX-94007

,fage7of9 i

REACTIVITY CONTROL SYSTEMS BASES *'

l l BORATION SYSTEMS (Continued)

With the RCS temperature below 200*F, one Boron Injection System is

acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the additional restrictions prohibiting

CORE ALTERATIONS and positive reactivity changes in the event the single Boron-

. Injection System becomes inoperable. .

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i The limitation for a maximum of two charging pumps to be OPERABLE and the l requirement to verify one charging pump to be inoperable below 350*F provides-l assurance that a mass addition pressure transient can be relieved by the'

! operation of a single PORV.

1 The limitation for minimum solution temperature of the borated water sources are sufficient to prevent boric acid crystallization with the highest j allowable boron concentration.

l The boron capability required below 200*F is sufficient to provide a SHUT-DOWN MARGIN of 1.3% Ak/k after xenon decay and cooldown from 200*F to 140*F.

This condition requires either 1,100 gallons of 7000 pga borated water from the- l b acid storage tanks or 7,113 gallons of 2400 ppe q 7%

j .r.it2)boratedwaterfromtheRWST.

a j As listed below, the required indicated levels for the boric acid' storage j tanks and the RWST include allowances for required / analytical volume, unusable i volume, measurement uncertainties (which include instrument error and tank j tolerances, as applicable), margin, and other required volume.

l Ind. Unusable Required Measurement

! Tank MODES Level Volume Volume Uncertainty Margin _0ther (gal) (gal) (gal) (gal)

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, RWST 5,6 24% 98,900 7,113 4% of span 10,293 N/A 1,2,3,4 95% 45,494 70,702 4% of span N/A 357,535*

!' Boric 5,6 105 3,221 1,100 65 of span N/A N/A i Acid EA 205 3,221 1,100 65 of span 3,679 N/A Storage ity Tank L

i 1.F. ,4 505 3,221. 15,700 6% of span N/A N/A j The OPERABILITY of one Baron Injection Systes during REFUELING ensures-

that this system is available for reactivity control while in MODE 6.

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Additional volume required to meet Specification 3... 54 4

! COMANCHE PEAK - UNITS 1 AND 2 8 3/4 1-3 Unit 1 - Amendment No. 6,19 -

Unit 2-AmendmentNo.( '

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Attgchment 3 to TXX-94007 j' c,Page 8 of 9 i

i j EMERGENCY CORE COOLING SYSTEMS i

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sAsEs i

}. ECCS SUBSYSTDRS (Continued) i i to be inoperable below 350'F provides assurance that a mass addition pressure ' !

j- transient can be relieved by the operation of a single'PORV.

] The requirement.to remove power from certain valve operators is in 2 1

accordance single failurewith Branch Technical Position ICS8-18 for valves that fail to meet considerations. Power is removed via key-lock switches on the.'

j control board.

I The Surveillance Requirements provided to ensure OPERA 8ILITY of each I

component ensures.that at a minimum, the assumptions.used in the safety analyses are met and that subsystem 0PERA8ILITY is maintained. Surveillance i

Requirements for throttle valve position stops and flow balance testing-i provide assurance that proper ECCS flows will be maintained in the event of, a i

i LOCA. Maintenance of proper. flow resistance and pressure drop in the piping ,

system to each injection point is necessary to:- (1) prevent total pump flow l i

3 from exceeding runout conditions when the system-is in its minimum resistance-configuration, (2) provide the proper flow split between injection points in-

! accordance with the assumptions used in the ECCS-LOCA analyses, and i (3) provide an acceptable level of total ECCS flow to all injection points j equal to or above that' assumed in the ECCS-LOCA analyses.

j 3/4.5.4 REFUELING WATER ST0pM E TAlet l The OPERABILITY of the refueling water storage tank.(RWST) as part of the ECCS ensures that a sufficient supply of' borated water is available for injec- -

l tion by the ECCS in the event of a LOCA. 1The limits on RWST minimum volume i

and boron concentration ensure that: (1) sufficient water is available within i i containment to permit recirculation cooling flow to the core, (2) for small

' break LOCA and steam line breaks, the reactor will remain subcritical in the cold condition following mixing of the RWST and the RCS water volumes with all j

control rods inserted except for the most reactive control assembly, (3) for large break LOCAs, the reactor will remain subcritical in the cold condition j following mixing of the RWST and the RCS water volumes with all shutdown and.

control rods. fu ly withdrawn, and (4) sufficient time is available for the operator to'take manual action'and complete switchover of ECCS and containment f

spray sucties to the containment sump without emptying the RWLf or losing suct a

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he regoired indicated level includes a 4-percent measurement i

uncertainty, an unusable volume of 45,4H gallons and a required water volume j of 428,237 gallons. i t

The limits on indicated water volume and boro _n concentration of the RWST 4 i

also ensure a long-ters pH value'of between 8.25(pr =M : (2.5 t Wit 'Nl 4 and 10.5 for the solution recirculated within containment-after a WCA.- This

! pH band minimizes the evolution of iodine and minimizes the effect of chloride l and caustic stress corrosion on mechanical systems and components.- -

COMANCHE PEAK - UNITS 1 AND 2 8 3/4 5-2 Unit. I'- Amendment No.19 .

, Unit 2 -- Amendment No. 5 .-

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=- . . . ~ . - _ _ . - . - . - - . .- - . . -. -. . _ _ _ _ _ _ _

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Attachment 3 to TXX-94007 t

! ,.Page 9 of9

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l l 3/4 9 REfilELING OPERATIONS j BASES 3/4.9.1 BORM CONCENTRATI.ON '

i The limitations on reactivity conditions during REFUELING ensure that: 4 l (1) the reactor will remain subcritical during CORE ALTERATIONS, and (2) a i 1 uniform boron concentration is maintained for reactivity control in the water -1 i volume having direct access to the reactor vessel. These limitations are i consistent with the initial conditions assumed for the boron dilution-incident i in the safety analyses. The value of 0.95 or less for K includes a 15 Ak/k j conservative allowance for uncertainties. Similar thfboronconcentration 4

value of 2400 ppegr Un't G::: ;p '- iMt *g, greater or includes a :

conservative uncertainty al owsnee of 50 ppe Doron. The locking closed of the required valves during refueling operations precludes the possibility of

uncontrolled boron dilution of the filled portion of the RCS.- This action ,

prevents flow to the RCS of unborated water by closing flow paths from sources of unborated water.

3/4.9.2 INSTRUMENTATION ,

i The OPERABILITY of the source range neutron flux monitors ensures that j redundant monitoring capability is available to detect changes in the i reactivity condition of the core.

3/4.9.3 DECAY TIME -

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! The minimum requirement for. reactor suberiticality prior to movement of l 1 irradiated fuel assemblies in the reactor vessel ensures that sufficient '

! time has elapsed to allow the radioactive decay of the short-lived fission i

j products. This decay time is consistent with the assumptions used in the i i safety analyses. i l I i 3/4.9.4 CONTAINENT BUILDING PENETRATIONS I

! The requirements on containment building penetration closure and

' OPERABILITY ensure that a release of radioactive material within containment

! willberestrictedfromleaka$etotheenvironment.=TheOPERA81LITYand closure restrictions are suff cient to restrict radioactive material release a from a fuel element rupture based upon the lack of containment pressurization

} potential whHe in the REFUELING MODE.

) 3/4.9.5 C0fHalICATIES j The requirement for communications capability ensures that refueling station personnel can be promptly informed of significant changes in the i facility status or core reactivity conditions during C0RE ALTERATIONS.

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COMANCHE PEAK - UNITS 1 AND 2 8 3/4 9-1 Unit 1 - Amendment No..19 ~

j_ Unit 2 - Amendment No. 5

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ML20063H740

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