Text

Proposed Tech Specs Increasing Minimum Required Boron Concentration in Boric Acid Tank from 6300 Ppm to 6600 Ppm
	ML20078C472
Person / Time
Site:	Millstone
Issue date:	01/18/1995
From:	; NORTHEAST NUCLEAR ENERGY CO.
To:	;
Shared Package
ML20078C462	List: B15086, Application for Amend to License NPF-49,incorporating Changes to Ts,By Increasing Minimum Required Boron Concentration in Boric Acid Tank from 6300 Ppm to 6600 Ppm; ML20078C472;
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	NUDOCS 9501260330
	Download: ML20078C472 (17)
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, March 11, 1991 l

1 1 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1.1.1 B0 RATION CONTROL SHUTDOWN MARGIN - MODES 1 AND 2 i LIMITING CONDITION FOR OPERATION f

3.1.1.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3% Ak/k for k both four loop and three loop operation.

APPLICABILITY: MODES 1 and 2*. h ACTION: 0 With the SHUTDOWN MARGIN less than 1.3% Ak/k, immediately initiate and con-tinue boration at greater than or equal to 33 gpm of a solution containing ) i greater than or equal to(30tf2pm boron or equivalent until the required l, l SHUTDOWN MARGIN is restored.

GLOD SURVEILLANCE RE0VIREMENTS j 4.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be greater than or equal W

i to 1.3% Ak/k:

a. Within I hour after detection of an inoperable control rod (s) and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod (s) is inoperable.

If the inoperable control r.:d is immovable or untrippable, the above required SHUTDOWN MARGIN eMll be verified acceptable with an I increased allowance for the, withdrawn worth of the immovable or untrippable control rod (s); ;

b. When in MODE 1 or MODE 2 with K,ff greater than or equal to 1 at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months by verifying that control bank withdrawal is within the limits of Specification 3.1.3.6;

c. When in MODE 2 with K,ff less than 1, within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6;

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading, by consideration of the factors of Specification >

4.1.1.1.2, with the control banks at the maximum insertion limit of Specification 3.1.3.6; and

See Special Test Exceptions Specification 3.10.1.

95o126o33o 950118 3 DR ADOCK 0500 MILLSTONE - UNIT 3 3/4 1-1 Amencment No. 60

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March 11, 1991 l

3/4.1 REACTIVITY CONTROL SYSTEMS f

3/4.1.1 BORATION CONTROL SHUTDOWN MARGIN - MODES 3. 4 AND 5 LOOPS FILLED LIMITING CONDITION FOR OPERATION ,

3.1.1.1.2 The SHUTDOWN MARGIN shall be greater than or equal to the limits f shown in Figures 3.1-1, 3.1-3 and 3.1-4 for four loop operation and in Figure 3.1-2 for three loop operatic,n. '

APPLICABILITY: MODES 3, 4 and 5 '

ACTION:

With the SHUTDOWN MARGIN less than the required value, immediately initiate and continue boration at greater tha equal to 33 gpm of a solution i

containing greater than or equal to pm boron or equivalent until the ) !

required SHUTDOWN MARGIN is restoreo.

Moo .

SURVEILLANCE REOUIREMENTS i 4.1.1.1.2.1 The SHUTDOWN MARGIN shall be determined to be greater than or equal to the required value:

a. Within I hour after detection of an inoperable control rod (s) and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod (s) is inoperable. !

If the inoperable control rod is immovable or untrippable, the above required SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable control rod (s); and

b. At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following factors:

1) Reactor Coolant System boron concentration,

2) Control rod position,

3) Reactor Coolant System average temperature,

4) Fuel burnup based on gross thermal energy generation,

5) Xenon concentration, and !

6) Samarium concentration.

4.1.1.1.2.2 Valve 3CHS-V305 shall be verified closed and locked at least once per 31 days.

MILLSTONE-JNIT3 3/4 1-3 Amendment No. 60

" 07 C J"z i

. . . .'- 1 REACTIVITY CONTROL SYSTENS SHUTDOWN EARGIN - COLD SHUTDOWN - LOOPS NOT FILLED LINITING C0stDITION FOR OPERATION 3.1.1.2 The SHUTDOWN MARGIN shall be greater than or equal to a) the limits shown in Figure 3.1-5 or b) the limits shown in Figure 3.1-4, with the chemical and volume b control system (CVCS) aligned to preclude reactor coolant system boron concentration reduction. L APPLICABILITY: MODE 5 LOOPS NOT FILLED ACTION:

a. With the SHUTDOWN MARGIN less than the above, imediately initiate W continue boration at greater than or 1 to 33 gpm of a solut' containing greater than or equal to pin boron or equivalent-the required SHUTDOWN MARGIN is restore . ccoo

b. With the CYCS dilution flow paths not closed and secured in position in accordance with Specification 3.1.1.2(b), immediately close and T

secure the paths or meet the limits shown in Figure 3.1-5. y SURVEILLANCE REQUIRENENTS 4.1.1.2.1 The SHUTDOWN MARGIN shall be determined to be greater than or equal to the above:

a. Within I hour after detection of an inoperable control rod (s) and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod (s) is inoperable.

If the inoperable control rod is immovable or untrippable, the SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable control rod (s); and

b. At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following' factors:

1) Reactor Coolant System boron concentration,

2) Control rod position,

3) Reactor Coolant System average temperature,

4) Fuel burnup based on gross thermal energy generation, NILLSTONE - UNIT 3 3/4 1-8 Amendment No. pp, 99 02N

. s March 11, 1991 REACTIVITY CONTROL SYSTEMS BORATED WATER SOURCE - SHUTDOWN LIMITING CONDITION FOR OPERATION 3.1.2.5 As a minimum, one of the following borated water sources shall be OPERABLE:

a. A Boric Acid Storage System with:

1) A r.inimum contained borated water volume of 6700 gallons,

2) A boron concentration betwee 6300 nd 7175 ppm, and '

3) A minimum solution temperature of 67'F. L6 co

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

1) A minimum contained borated water volume of 250,000 gallons,

2) A minimum boron concentration of 2700 ppm, and Li

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.

SURVEILLANCE REOUTREMENTS 4.1.2.5 The above required borated water source shall be demonstrated OPERABLE:

a. At least once per 7 days by:

1) Verifying the boron concentration of the water,

2) Verifying the contained borated water volume, and

3) Verifying the Boric Acid Transfer Pump Room temperature and the boric acid .etorage tank solution temperature when it is the source of borated 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 it is the source of borated water and the outside air temperature is less than 35'F.

MILLSTONE - UNIT 3 3/4 1-17 2D*V'egio Amendment No.60

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October 5, 1993

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REACTIVITY CONTROL SYSTEMS B0 RATED WATER SOURCES - OPERATING LINITING CONDITION FOR OPERATION

.3.1.2.6 As a minimum the following borated water source (s) shall be OPERABLE 1s required by Specification 3.1.2.2:

a. A Boric Acid Storage System with:

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1) A minimum borated water usable volume of 21,802 gallons,

2) A boron concentration betwee 300 nd 7175 ppe, and (

3) A minimum solution temperature of 67'F. 66co

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

1) A minimum contained borated water volume of 1,166,000 l gallons, 1

2) A boron concentration between 2700 and 2900 ppe,

3) A minimum solution temperature of 40*F, and

4) A maximum solution temperature of 50'F.

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

3 AGIlmi:

4 l a. With the Boric Acid Storage System ino>erable, restore the system i

to OPERABLE status within 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months or >e 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 the limits as shown in Figure 3.1-4 at 200'F; restore the Boric Acid Storage System to OPERABLE status I within the next 7 days or be in COLD-SHUTDOWN within the next 30 hours3.472222e-4 days 0.00833 hours 4.960317e-5 weeks 1.1415e-5 months , i

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b. With the RWST ino>erable, restore the tank to OPERABLE status within I hour or .>e in at least HOT STANDBY within the next' 4

6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months anf 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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4 l MILLSTONE - UNIT 3 3/4 1-18 Amendment No. ##, 83 i C.3/D

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. 3/4.9 REFUELING OPERATIONS 3/4.9.1 B0RON CONCENTRATION l

LINITING C00EITION FOR OPERATION 3.9.1.1 The boron concentration of all filled portions of the Reactor Coolant 1 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 J

. a. A K, of 0.95 or less, or 1

b. A bcron concentration of greater than or equal to 2600 ppm.

Additionally, the CVCS valves of Specification 4.1.1.2.2 shall be closed and ,

secured in position.

APPLICABILITY: MODE 6.*

ACTION:

a. With the requirements of the above specification not satisfied, immediately suspend all operations' involving CORE ALTERATIONS or positive reactivity changes and initiate and continue boration at greater than or eq al to 33 gpm of a solution containing greater than or equal to 6 0 ppm boron or its equivalent until K, is reduced to less than o equal to 0.95 or the boron concentration is restored to greater than or equal to 2600 ppm, whichever is the more restrictive. ,

9 y

b. With any of the CVCS valves of Specification 4.1.1.2.2 not closed ** /

and secured in position, imediately close and secure the valves.

l SURVEILLANCE REQUIRENENTS l

4.9.1.1.1 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 full-length control rod in excess of 3 feet from its fully inserted position within the reactor vessel. j 4.9.1.1.2 The boron concentration of the Reactor Coolant System and the )

refueling canal shall be determined by chemical analysis at least once per l 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

4.9.1.1.3 The CVCS valves of Specification 4.1.1.2.2 shall be verified closed and locked at least once per 31 days.

The reactor shall be maintained in MODE 6 whenever fuel is in the reactor l vessel with the vessel head closure bolts less than fully tensioned or with j W head removed.

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- Except those opened under administrative control.

NILLSTONE - UNIT 3 3/4 9-1 Amendment No. pp, pp, 99 omie

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f l . 1 3/4.10 SPECIAL TEST EXCEPTIONS JAN jl jggg l 3/4.10.1 SHUT 00WN MARGIN l

LIMITING CONDITION FOR OPERATION 3.10.1 The SHUTDOWN MARGIN requirement.of Spccification 3.1.1.1 may be suspended for measurement of control rod worth and SHUTDOWN MARGIN provided reactivity equivalent to at least the highest estimated control rod worth is available for trip insertion froe. OPERABLE control rod (s).

APPLICABILITY: MODE 2.

ACTION:

a. With any full-length control rod not fully inserted nd with less than the above reactivity equivalent available for trip insertion, immediately initiate and continue boration at greater than or equal '

to 33 gpm of a solution containing greater than or equal to dFOCPppm boron or its equivalent until the SHUTDOWN MARGIN required gM / by Specification 3.1.1.1 is restored.

b. With all full-length control rods fully inserted and the reactor subcritical by less than the above reactivity equivalent, immedi-ately initiate and continue boration at greater than or equal to 33 gpm of a solution containing greater than or equal to(fdp ' ppm g

' boron or its equivalent until the SHUTDOWN MARGIN required by 1 Specification 3.1.1.1 is restored.

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SURVEILLANCE REQUIREMENTS 4.10.1.1 The position of each full-length control rod either partially or fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

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4.10.1.2 Each full-length control rod not fully inserted shall be demonstrated capable of full insertion when tripped from at least the 50% withdrawn position l

l withh 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prior to reducing the SHUTDOWN MARGIN to less than the limits of l Specifica. tion 3.1.1.1.

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l MILLSTONE - UNIT 3 3/4 10-1 l CA __.

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l OctM er 5, 1993 i REACTIVITY CONTROL SYSTEMS i

! BASES i

l l B0 RATION SYSTEMS (Continued)

MARGIN from expected operating conditions of equivalent to that required by Figure 3.1-5 after xenon decay and cooldown to 200*F. The maximum boration

! capability boration volume) requirement is established to

! conservativelybound (minimum expected operating conditions throughout core operating l life. The initial RCS boron concentration is based on a minimum expected hot y

! full power or hot zero power condition (peak xenon . The final RCS boron '

l~ concentration assumes that the most reactive control ) rod is not insert the core.. This set of conditions requires a minimum usable volume of 21,802 gallons of pa borated water from the boric acid storage tanks or l 1,166,000 ga s 700 ppe borated water from the refueling water storage i tank (RWST). A minia volume of 1,166,000 gallons is specified to be consistent with ECCS requiremen .

l 46eo With the RCS temperature below 200*F, one Boron Injection System is i acceptable without single failure consideration on the basis of the stable j 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.

4

The limitation for a maximum of one centrifugal charging pump to be OPER-1 ABLE and the Surveillance Requirement to verify all charging pumps except the l required OPERABLE pump to be inoperable below 350*F provides assurance that a mass addition pressure transient can be relieved by the operation of a single PORV.

j The boron capability required below 200*F is sufficient to provide a SHUTDOWN MARGIN of 1.31f, Ak/k after xenon decay and cooldown from 200'F to i 140*F. This condition requires eithe a usable volume of 4100 gallons of

@0 270 ppm borated water from the RWST. ppm borated water from the boric acid The unusable volume in each boric acid g storage tank is 1300 gallons.

The contained water volume limits include allowance for water not available because of discharge line location and other physical characteristics.

The limits on contained water volume and boron concentration of the RWST also ensure a pH value of between 7.0 and 7.5 for the solution recirculated within containment after a t.0CA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on mechanical systems and components.

The minimum RWST solution temperature for MODES 5 and 6 is based on analysis assumptions in addition to freeze protection considerations. The minimum /saximus RWST solution temperatures for MODES 1, 2, 3 and 4 are based on analysis assumptions.

MILLSTONE - UNIT 3 8 3/4 1-3 Amendment JJ, p 83 "o 3 t3

o Docket No. 50-423 B15086 1

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i Attachment 2 j Millstone Nuclear Power Station, Unit No. 3 i Proposed Revision to Techaical Specifications

! Minimum Boron Concentration in the Boric Acid Tanks 1

Retypen Pages i i i 1 !

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i January 1995 1

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I 3/4.1 REACTIVITY CONTROL SYSTEMS 3/4.1.1.1 B0 RATION CONTROL SHUTDOWN MARGIN - MODES 1 AND 2 LIMITING C0lWITION FOR OPERATION 3.1.1.1.1 The SHUTDOWN MARGIN shall be greater than or equal to 1.3% lx/k for ;

both four loop and three loop operation.

APPLICABILITY: MODES 1 and 2*. ,

ACTION:

With the SHUTDOWN MARGIN less than 1.3% Ak/k, immediately initiate and con-tinue boration at greater than or equal to 33 gpm of a solution containing greater than or equal to 6600 ppm boron or equivalent until the required SHUTDOWN MARGIN is restored. !

SURVEILLANCE REQUIRENENTS 4.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be greater than or equal to 1.3% Ak/k:

a. Within I hour after detection of an inoperable control rod (s) and at least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while f.he rod (s) is inoperable.

If the inoperable control rod is immovable or untrippable, the above required SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable control rod (s);

b. When in MODE 1 or MODE 2 with K.n greater than or equal to 1 at I least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months by verifying that control bank withdrawal is within the limits of Specification 3.1.3.6;

c. When in MODE 2 with K,y less than 1, within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months prior to achieving reactor criticality by verifying that the predicted critical control rod position is within the limits of Specification 3.1.3.6;

d. Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading, by consideration of the factors of Specification 4.1.1.1.2, with the control banks at the maximum insertion limit of Specification 3.1.3.6; and

See Special Test Exceptions Specification 3.10.1.

NILLSTONE - UNIT 3 3/41-1 Amendment No. pp, 0307

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3/4.1 R'EACTIVITY CONTROL SYSTEMS 3/4.1.1 B0 RATION CONTROL SHUTDOWN MARGIN - MODES 3. 4 AE 5 LOOPS FILLED LIMITING COMITION FOR OPERATION 3.1.1.1.2 The SHUTDOWN MARGIN shall be greater than or equal to the limits shown in Figures 3.1-1, 3.1-3 and 3.1-4 for four loop operation and in Figure 3.1-2 for three loop operation.

APPLICABILITY: MODES 3, 4 and 5 ACTION:

With the SHUTDOWN MARGIN less than the required value, immediately initiate and continue boration at greater than or equal to 33 gpm of a solution containing greater than or equal to 6600 ppm boron or equivalent until the required SHUTDOWN MARGIN is restored.

SURVEILLANCE REQUIREMENTS 4.1.1.1.2.1 The SHUTDOWN MARGIN shall be determined to be greater than or l equal to the required value-l !

Within I hour after detection of an inoperable control rod (s) and at j a.

least once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod (s) is inoperable.

l If the inoperable control rod is immovable or untrippable, the above required SHUTDOWN MARGIN shall be verified acceptable with an increased allowance for the withdrawn worth of the immovable or untrippable control rod (s); and

b. At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following factors:

1

1) Reactor Coolant System boron concentration,

2) Control rod position,

3) Reactor Coolant System average temperature,

4) Fuel burnup based on gross thermal energy generation,

5) Xenon concentration, and

6) Samarium concentration.

l 4.1.1.1.2.2 Valve 3CHS-V305 shall be verified closed and locked at least once i

per 31 days.

l MILLSTONE - UNIT 3 3/4 1-3 Amendment No. pp, 0300

e

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REACTIVITY CONTROL SYSTEMS SHUTDOWN MARGIN - COLD SHUTD0WN - LOOPS NOT FILLED I

LIMITING ColeITION FOR OPERATION 3.1.1.2 The SHUTD0WN MARGIN shall be greater than or equal to l

l a) the limits shown in Figure 3.1-5 or b) the limits shown in Figure 3.1-4, with the chemical and volume control system (CVCS) aligned to preclude reactor coolant system

boron concentration reduction.

' 1 i APPLICABILITY: MODE 5 LOOPS NOT FILLED i

ACTION: l l a. With the SHUTDOWN MARGIN less than the above, immediately initiate and t

continue boration at greater than or equal to 33 gpm of a solution

containing greater than or equal to 6600 ppm boron or equivalent until ;

the required SHUTDOWN MARGIN is restored.

]

b. With the CVCS dilution flow paths not closed and secured in position in accordance with Specification 3.1.1.2(b), immediately close and secure the paths or meet the limits shown in Figure 3.1-5.

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! SURVEILLANCE REQUIREMENTS i

a

4.1.1.2.1 The SHUTDOWN MARGIN shall be determined to be greater than or equal to <

the above: ;

a. Within 1 hour1.157407e-5 days 2.777778e-4 hours 1.653439e-6 weeks 3.805e-7 months after detection of an inoperable control rod (s) and at l 1 east once per 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months thereafter while the rod (s) is inoperable.

If the inoperable control rod is immovable or untrippable, the 1 SHUTDOWN MARGIN shall be verified acce) table with an increased j allowance for the withdrawn worth of t1e immovable or untrippable control rod (s); and

b. At least once per 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months by consideration of the following ,

factors: l

1) Reactor Coolant System boron concentration,

2) Control rod position,

3) Reactor Coolant System average temperature,

4) Fuel burnup based on gross thermal energy generation, 1

MILLSTONE - UNIT 3 3/4 1-8 Amendment No. JJ, JJ, 0309

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l REACTIVITY CONTROL SYSTEMS l 80 RATED WATER SOURCE - SHUTDOWN I LINITING COMITION FOR OPERATION i

1 3.1.2.5 As a minimum, one of the following borated water sources shall be

OPERABLE

a. A Boric Acid Storage System with:

l 1) A minimum contained borated water volume of 6700 gallons, i

2) A boron concentration between 6600 and 7175 ppa, and i

j 3) A minimum solution temperature of 67'F.

I

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

j 1) A minimum contained borated water volume of 250,000 gallons, i

! 2) A minimum boron concentration of 2700 ppm, and

} 3) A minimum solution temperature of 40*F.

i APPLICABILITY: MODES 5 and 6.

{ ACTION:

l With no borated water source OPERABLE, suspend all operations involving CORE

]-

ALTERATIONS or positive reactivity changes.

l SURVEILLANCE REQUIREMENTS i

j 4.1.2.5 The above required borated water source shall be demonstrated

' OPERABLE:

j a. At least once per 7 days by:

j 1) Verifying the boron concentration of the water, l 2) Verifying the contained borated water volume, and i

3) Verifying the Boric Acid Transfer Pump Room temperature and the boric acid storage tank solution temperature when it is

the source of borated water.

j 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 it is the source of borated water and the outside air temperature is less than 35'F.

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l i NILLSTONE - UNIT 3 Amendment No. pp, 0310 3/4 1-17

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l REACTIVITY CONTROL SYSTEMS B0 RATED WATER SOURCES - OPERATING l LINITING C0fBITION FOR OPERATION

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

as required by Specification 3.1.2.2:

a. A Boric Acid Storage System with:

1) A minimum borated water usable volume of 21,802 gallons,

2) A boron concentration between 6600 and 7175 ppe, and j

3) A minimum solution temperature of 67'F.

]

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

]

j 1) A minimum contained borated water volume of 1,166,000 l

gallons,

2) A boron concentration between 2700 and 2900 ppm, l

3) A minimum solution temperature of 40*F, and j 4) A maximum solution temperature of 50*F.

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

. ACTION:

1

! a. With the Boric Acid Storage System inoperable, restore the system i 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 i equivalent to at least the limits as shown in Figure 3.1-4 at .

200*F; restore the Boric Acid Storage System to OPERABLE status !

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

b. With the RWST inoperable, restore the tank to OPERABLE status i within I hour or be in at least HOT STANDBY within the next j 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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l 1 NILLSTONE - UNIT 3 3/4 1-18 Amendmert No. pp, 77, 0310 1

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l_ 3/4.9 REFUELING OPERATIONS i 3/4.9.1 BORON CONCENTRATION 1

LIMITING COMITION FOR OPERATION

! 3.9.1.1 The boron concentration of all f 6'ied portions of the Reactor Coolant i System and the refueling canal shall be waintained uniform and sufficient to j ensure that the more restrictive of the following reactivity conditions is j met; either:

I

a. A K,,, of 0.95 or less, or i b. A boron concentration of greater than or equal to 2600 ppe.

t l

Additionally, the CVCS valves of Specification 4.1.1.2.2 shall be closed and l

{ secured in position. ;

? APPLICABILITY: NODE 6.*

l ACTION:

i ,

1 a. With the requirements of the above specification not satisfied, i j immediately suspend all operations involving CORE ALTERATIONS or i positive reactivity changes and initiate and continue boration at j greater than or equal to 33 gpm of a solution containing greater I

than or equal to 6600 ppa boron or its equivalent until K.,, is 4 reduced to less than or equal to 0.95 or the boron concentration is j restored to greater than or equal to 2600 ppe, whichever is the more ,

j restrictive.

l b. With any of the CVCS valves of Specification 4.1.1.2.2 not closed **

l and secured in position, immediately close and secure the valves.

! SURVEILLANCE REQUIREMENTS

}

l 4.9.1.1.1 The more restrictive of the above two reactivity conditions shall be determined prior to:

i

a. Removing or unbolting the reactor vessel head, and

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

{ 4.9.1.1.2 The boron concentration of the Reactor Coolant System and the 1 refueling canal shall be determined by chemical analysis at least once per j 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months .

I i 4.9.1.1.3 The CVCS valves of Specification 4.1.1.2.2 shall be verified closed j and locked at least once per 31 days.

1 1 *The reactor shall be maintained in NODE 6 whenever fuel is in the reactor

! vessel with the vessel head closure bolts less than fully tensioned or with j the head removed.

i

) **Except those opened under administrative control.

MILLSTONE - UNIT 3 3/4 9-1 Amendment No. pp, pp, 77, 0311 1

4 .

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I' ? ','

4 3/4.10 SPECIAL TEST EXCEPTIONS I -

i 3/4.10.1 SIRITD0tBI NARGIN t

LIMITING COMITION FOR OPERATION

]

j 3.10.1 The SHUTDOWN MARGIN requirement of Specification 3.1.1.1 may be

! suspended for measurement of control rod worth and SHUTDOWN MARGIN provided j reactivity equivalent to at least the highest estimated control rod worth is

available for trip insertion from OPERABLE control rod (s).

] APPLICABILITY: MODE 2.

j ACTION:

i j a. With any full-length control rod not fully inserted and with less

< than the above reactivity equivalent available for trip insertion, immediately initiate and continue boration at greater than or equal

', to 33 gpa of a solution containing greater than or equal to 4 6600 ppe boron or its equivalent until the SHUTDOWN MARGIN required i by Specification 3.1.1.1 is restored. i j !

j b. With all full-length control rods fully inserted and the reactor l j subcritical by less than the above reactivity equivalent, immedi- '

j' ately initiate and continue boration at greater than or equal to !

33 gpa of a solution containing greater than or equal to 6600 ppa j boron or its equivalent until the SHUTDOWN MARGIN required by j Specification 3.1.1.1 is restored.

2 SURVEILLANCE REQUIRENENTS !

I i

! 4.10.1.1 The position of each full-length control rod either partially or i j fully withdrawn shall be determined at least once per 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months .

4 j 4.10.1.2 Each full-length control rod not fully inserted shall be demonstrated j capable of full insertion when tripped from at least the 50% withdrawn position .

1 within 24 hours2.777778e-4 days 0.00667 hours 3.968254e-5 weeks 9.132e-6 months prior to reducing the SHUTDOWN MARGIN to less than the limits of l Specification 3.1.1.1. ,

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f !

i i

l

! NILLSTONE - UNIT 3 3/4 10-1 Amendment No.

j osu

y =:

i REACTIVITY CONTROL SYSTEMS l

4 BASES l

BORATION SYSTEMS (Continued) l MARGIN from expected operating conditions of equivalent to that required by

Figure 3.1-5 after xenon decay a.3d cooldown to 200*F. The maximum boration l capability (minimum boration nlume) requirement is established to

! conservatively bound expected opers ting conditions throughout core operating j life. The initial RCS boron concentration is based on a minimum expected hot

full power or hot zero power condition (peak xenon). The final RCS baron

! concentration assumes that the most reactive control rod is not inserted into i the core. This set of conditions requires a minimum usable volume of 21,802 gallons of 6600 ppe borated water from the boric acid storage tanks or 4 1,166,000 gallons of 2700 ppe borated water from the refueling water storage i i

tank (RWST). A minimum RWST volume of 1,166,000 gallons is specified to be :

consistent with ECCS requirement. l With the RCS temperature below 200*F, one Boron Injection System is

! acceptable without single failure considerttion on the basis of the stable ,

j reactivity condition of the reactor and the additional restrictions l j prohibiting CORE ALTERATIONS and positive reactivity changes in the event the i j single Boron Injection System becomes inoperable. ,

i

The limitation for a maximum of one centrifugal charging pump to be OPER-ABLE and the Surveillance Requirement to verify all charging pumps except the i required OPERABLE pump to be inoperable below 350*F provides assurance that a

mass addition pressure transient can be relieved by the operation of a single

! PORV.

i l The boron capability required below 200*F is sufficient to provide a

SHUTDOWN MARGIN of 1.3f, Ak/k after xenon decay and cooldown from 200*F to 140*F. This condition requires either a usable volume of 4100 gallons of j 6600 ppe borated water from the boric acid storage tanks or 250,000 gallons of 2700 ppa borated water from the RWST. The unusable volume in each boric acid

storage tank is 1300 gallons.

a

! The contained water volume limits include allowance for water not i available because of discharge line location and other physical characteristics.

1

! The limits on contained water volume ard boron concentration of the RWST also ensure a pH value of between 7.0 and 7.5 for the solution recirculated within containment after a LOCA. This pH band minimizes the evolution of iodine and minimizes the effect of chloride and caustic stress corrosion on i

] mechanical systems and components.

1

! The minimum RWST solution temperature for MODES 5 and 6 is based. on 1 inalysis assumptions in addition to freeze protection considerations. The

! minimus/ maximum RWST solution temperatures for MODES 1, 2, 3 and 4 are based on j analysis assumptions.

1 i

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4 j NILLSTONE - UNIT 3 5 3/4 1-3 Amendment JJ pp, 57, '

0313 3

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ML20078C472

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