ML17300A846

Proposed Tech Specs,Incorporating Allowances for Manually Reducing Low Pressurizer Pressure & Low Steam Generator Pressure Trip Setpoints

ML17300A846
Person / Time
Site:	Palo Verde
Issue date:	05/11/1987
From:	Haynes J ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:
Shared Package
ML17300A845	List: ML17300A844 ML17300A846
References
TAC-65697, NUDOCS 8705220174
Download: ML17300A846 (4)

Text

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~'CQMYROLL~V BV uSER TABLE 2.2-1 (Continued)

REACTOR PROTECTIVE INSTRUMENTATION TRIP SETPOINT LIMITS TABLE NOTATIONS (1) Trip may be manually bypassed above 10-~X of RATED THERMAL POWER; bypass shall be automatically removed when THERMAL POWER is less than or equal to 10-~X of RATED THERMAL POWER.

9- e (2) In MODES - value may be decreased manually, to a minimum of 100 psia, as pressurizer pressure is reduced, provided the margin between the pres-surizer pressure and this value is maintained at less than or equal to 400 psi; the setpoint shall be increased automatically as pressurizer pressure is increased until the trip setpoint is reached. Trip may be manually bypassed below 400 psia; bypass shall be automatically removed whenever pressurizer pressure is greater than or equal to 500 psia.

(3) In MODES 3 value may be decreased manually as steam generator pressure is ~reduced, provided the margin between the steam generator pressure and this v'alue is maintained at less than or equal to 200 psi; the setpoint shall be increased automatically as steam generator pressure is increased until the trip setpoint is reached.

(4) Irange of the distance between instrument nozz'}es.

steam generator upper and lower level wide

-5)- As-stored within the Core Protection Calculator (CPC). Calculation of the trip setpoi'nt includes measurement, calculational and processor uncer-tainties, and dynamic allowances. Trip may be manually bypassed below 1X of RATED THERMAL POWER; bypass shall be automatically removed when THERMAL POWER is greater than or equal to Lo Qf RATED THERMAL C

POWER.

The approved ONBR limit is 1.231 which includes a partial rod bow penalty compensation. -If the fuel burnup exceeds that for which an increased rod bow penalty is required, the DNBR limit shall be adjusted. In this case a ONBR trip setpoint of 1.231 is allowed provided that the difference is by an increase in the CPC addressable constant BERRl as follows:

com-'ensated o d (X POL)

BERR1new = BERR101d 1++

Ll 100 x d (X DNBR) 3 I

where BERR1 olldd is the uncompensated value of BERR1; RB is the fuel rod bow penalty in I DNBR; RB is the fuel rod bow penalty in I DNBR already accounted for in the DNBR limit; POL is the power operating limit; and d (X POL)/d (X ONBR) is the absolute value of the most adverse derivative of POL with respect to DNBR.

220i74 8705ii 0500052~

PDR ADOCR, ',

PDR P

"-PA+ VERDE " UNIT 1 2-5 CQ

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CGNTRGLLEi9 BV USiER TABLE 3.3-3 (Continued)

TABLE NOTATIONS (a) In MODES the value may be decreased manually, to a minimum of 100 psia, as pressurizer pressure is reduced, provided the margin between the pressurizer pressure and this value is maintained at less tha 1.

sIrr s'. the setpoint shall be increased automatica11y as pressurizer to 400 psi; pressure is increased until the trip setpoint is reached. Trip may be manually bypassed below 400 psia; bypass shall be automatically removed whenever pressurizer pressure is'greater than or equal to 500 psia.

(b) In MODES~ the value may be decreased manually as steam earn genera t or ressure is reduced, provided the margin between the steam generator pressure and this value is maintained at less than or equal to 200 psi; the setpoint shall be increased automatically as steam generator pressure increased until the trip setpoint is reached.

's (c) Four channels provided, arranged in a selective two-out-of-four J'

configuration (i.e., one-out-of-two taken twice).

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(d) The proper two-out-of-four combination.

The provisions of Specification 3. 0. 4 are not applicable.

After the initial criticality of Unit 2 or Unit 3.

~ ~ ACTION STATEMENTS ACTION 12 - With the number of OPERABLE channels one less than the Total Number of Channels, restore the inoperable channel to OPERABLE status, within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> or be in at least HOT STANDBY within the next 6. hours and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

ACTION 13 - Qith the number of channels OPERABLE one less than the Total Number of Channels, STARTUP and/or POWER OPERATION may continue provided the inoperable channel is placed in the bypassed or.

tripped condition within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />. If the inoperable channel is bypassed, the desirability of maintaining this channel in the,

~ bypassed condition shall be reviewed in accordance with Specification 6.5. 1. 6. h. The channel shall be returned to OPERABLE status no later than during the next COLD SHUTDOWN.

With a channel process measurement circuit that affects multiple functional units inoperable or in test, bypass or trip all associated functional units as listed below.

Process Measurement Circuit

1. Steam Generator Pressure- Steam Generator Pressure - Low Low Steam Generator Level 1-Low (ESF Steam Generator Level 2-Low (ESF

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2. Steam Generator Level Steam Generator Level - Low (RPS

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(Wide Range) Steam Generator Level 1-Low (ESF

, I Steam Generator Level 2-Low (ESF PALO VERDE " UNIT 1 3/4 3-23 f'A

s p,