ML18053A518

Proposed Tech Spec Table 3.17.4 Re Pressurizer Water Level Instruments

ML18053A518
Person / Time
Site:	Palisades
Issue date:	08/19/1988
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML18053A517	List: ML18053A516 ML18053A518 ML18053A520
References
NUDOCS 8808240312
Download: ML18053A518 (8)

Text

ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 TECHNICAL SPECIFICATIONS PAGE CHANGES

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PDR ADOCK 05 PNU j

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. l__l OC0888-0093-NL02-NL04 August 19, 1988 4 Pages

No

8.

9.

10.

11.

12.

13.

14.

15.

16.

Functional Unit Pressurizer Wide Range Water Level Indication Pressurizer Code Safety Relief Valves Position Indication (Acoustic Monitor or Temperature Indication)

Power Operated Relief Valves (Acoustic Monitor or Temperature Indication)

I l

PORV Isolation Valves Position Indication Subcooling Margin Monitor Auxiliary Feed Flow Rate Indication Auxiliary Feedwater System Sensor Channels Auxiliary Feedwater Actuation System Actuation Channels Excore Detector Table 3.17.4 (Cont'd)

Minimum Minimum Operable Degree of Channels Redundancl 2 (1, p' q)

None 1 per None Valve 1 per None Valve 1 per None Valve 1

None 1 per flow(h)

None Control Valve 2 per ste~

generator e) 1 1

None Permissible Bypass Conditions Not required in Cold or Refuel-ing Shutdown Not Required below 325°F Not required when.

PORV isolation valve is closed and its indication system is operable Not required when reactor is depressurized and vented through a vent i?;l. 3 sq. in.

Not required below 515°F Not required below 325°F Not required Actuation below 325°F Not required below 325°F None (e)

Auxiliary Feedwater Syste~_Ac~~atigp $y~tem Sensor Channels contain pump auto initiation circuitry. If two sensor channels for one steam generator are inoperable, one of the steam generator low level bistable modules in one of the inoperable channels must be in the tripped condition.

3-8la Amendment No.

~S, 9~,

OC0888-0093-NL02-NL04 I

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Table 3.17.4 (Cont'd)

(f)

With one Auxiliary Feedwater Actuation System Actuation Channel inoperable, in lieu of the requirement of 3.17.2, provide a second licensed operator in the contro.l room within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

With both inoperable, in lieu of following the requirements of 3.17.2, start and maintain in operation the turbine driven auxiliary feed pump.

(g)

Calculate the Quadrant Power Tilt using the excore readings at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> when the excore detectors deviation alarms are inoperable.

(h)'

With two flow rate indicators inoperable for a given control valve, the control valve.shall be considered inoperable and the requirements of 3.5.2(e) apply.

(1)

(p)

(q)

The provisions of Specification 3.0.4 are not applicable.

With one OPERABLE Pressurizer Wide Range Water Level Channel in lieu of the requirement of 3.17.2, restore the inoperable channel to OPERABLE status within 7 days or be in at least HOT SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

With no OPERABLE Pressurizer Wide Range Water Level Channels in lieu of the requirements of 3.17.2, either restore at least one of the inoperable channels 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 SHUTDOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />."

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I Amendment No.

9~, 9S, OC0888-0093-NL02-NL04

TABLE 4.1.3 Minimum Frequencies for Checks, Calibrations and Testing of Miscellaneous Instrumentation and Controls Channel Description

1.

Start-Up Range Neutron Monitors

2.

Primary Rod Position Indication System

3.

Secondary Rod Position Indication System

4.

Area Monitors i

Note: Process Mo~itor Surveillance Requirements are located in Tables 4.24-1 and 4.24-2

5.

Emergency Plan Radiation Instruments

6.

Environmental Monitors

7.

Pressurizer Level Instruments OC0888-0093-NL02-NL04

a.

b.

a.

b.

c.

a.

b.

c.

a.

b.

c.

a.

b.

a.

b.

a.

b.

c.

Surveillance Function Check Test Check Check Calibrate (1)

Check Check 1

Calibrate ( )

Check Calibrate Test Calibrate Test Check Calibrate Check Calibrate Test Frequencl:

4-10 s

p s

M R

s M

R D

R M

A M

M A

s R

M Surveillance Method

a.

Comparison of both channel count rate indications when in service.

b.

Internal test sign~ls.

a.

Comparison of output data with secondary RPIS

b.

Check of power dependent insertion limits monitoring system.

c.

Physically measured rod drive position used to verify system accuracy.

Check position interlocks.

a.

Comparison of output data with primary RPIS.

b.

Same as 2(b) above.

c.

Same as 2(c) above, including out-of-sequence alarm function.

a.

Normal readings observed and intetnal test signals used to verify instrument operation.

b.

Exposure to known external radiation source.

c.

Detector exposed to remote operated radiation check source.

a.

Exposure to known radiation source.

b.

Battery check.

a.

Operational check.

b.

Verify airflow indicator.

a.

Comparison of two wide and two narrow range independent level readings.

b.

Known differential pressure applied to sensor.

c.

Signal to meter relay adju~ted with test device.

Amendment No. 28, $$,

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4.1 Basis (continued)

For the specified one-month test interval, the average unprotected

~ime is 360 hours0.00417 days <br />0.1 hours <br />5.952381e-4 weeks <br />1.3698e-4 months <br /> in case of a failure occurring between test intervals, thus the probability of failure of one channel between test intervals is 360 x 1.14 x 10-S or 4.1 x 10-3*

Since two channels must fail in order to negate the safety function, the probability of simultaneous failure of two-out-of-four channels is

-3 3

-8 (4.1 x 10

) = 6.9 x 10 This represents the fraction of time in which each four-channel system would have one operable and three

-8 inoperable channels and equals 6.9 x 10 x 8760 hours0.101 days <br />2.433 hours <br />0.0145 weeks <br />0.00333 months <br /> per year, or 2.16 seconds/year.

These estimates are conservative and may be considered upper limits.

Testing intervals will be adjusted as appropriate based on the accumulation of specific operating history.

The testing frequency of the process instrumentation is considered adequate (based on experience at other conventional and nuclear plants on Consumers Power Company's system) to maintain the status of the instruments so as to assure safe operation.

As the reactor protection system is not required when the plant is in a refueling shutdown condition, routine testing is not required.

Those instruments which are similar to the reactor protective system instruments are tested at a similar frequency and on the same basis.

I Since the wide and narrow range indicators are calibrated at I

different temperatures it is not appropriate to compare the wide I

range instruments with the narrow range.

The shift comparison I

surveillance requirement, Table 4.1.3, item No. 7a., is intended I

to compare the two wide range indicators with each other and the I

two narrow range indicators with each other.

I 4-2a Amendment No. Jt, OC0888-0093-NL02-NL04

ATTACHMENT Consumers Power Company Palisades Plant Docket 50-255 REVISION TO PAGES FOR NOVEMBER 21, 1985 TSCR ALTERNATE SHUTDOWN AND EMERGENCY LIGHTING SYSTEMS August 19, 1988 2 Pages OC0888-0093-NL02-NL04

Table 3.25.1 ALTERNATE SHUTDOWN MINIMUM EQUIPMENT Minimum No Instrumentation Equipment 1

Pressurizer Pressure 1

(PI-0110) 2 Pressurizer Level 1

(LI-0102B) 3 Reactor Coolant Hot Leg llLoop Temperature (TI-0112HAA)

(TI-0122HAA) 4 Reactor Coolant Cold Leg llLoop Temperature (TI-0112CAA)

(TI-0122CAA) 5 Steam Generator Pressure 1/S.G.

(PI-0751E)

(PI-0752E) 6 Steam Generator Level llS.G.

(LI-0757C)

(LI-0758C) 7 Start-up Range Neutron 1

Monitor (N-OOlA) 8 Auxiliary Feedwater 1

Suction Pressu~e (PS-0741D) 9 SIRW Tank Lev.el 1

(LT-0332B) 10 Auxiliary Feedwater

- llS.G.

Flow Rate (FI-0727B)

(FI-0749B) 3-135 OC0888-0093-NL02-NL04 Readout Location C150 Cl50 Cl50A C150A Cl50A C150 C150A C150 Cl50A Cl50 I

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Proposed

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TABLE 4.20.1

,/

ALTERNATE SHUTDOWN MONITORING INSTRUMENTATION I

SURVEILLANCE REQUIREMENTS I

Surveillance Surveillance I

Channel DescriEtion Function Frequenc~

Method I

1. Pressurizer Pressure Indication

a.

Check( 1)

Quarterly

a.

Compare independent I

(PI-OllO) pressure readings I

b.

Calibrate Refueling

b.

Known pressure applied I

Cycle to pressure sensor I

2.

Pressurizer Wide Range Level Indication

a.

Check(!)

Quarterly

a.

Compare independent (LI-0102B) level readings II

b.

Calibrate Refueling

b.

Apply known differential I

Cycle pressure to level sensor I

3.

Reactor Coolant Hot Leg Temperature

a.

Check(!)

Quarterly

a.

Compare independent I

Indication (TI-0112HAA) temperature readings I

(TI-0122HAA)

b.

Calibrate Refueling

b.

Substitute known I

Cycle resistance for RTD I

4.

Reactor Coolant Cold Leg Temperature

a.

Check(!)

Quarterly

a.

Compare independent I

Indication (TI-0112CAA) temperature readings I

(TI-0122CAA)

b.

Calibrate Refueling

b.

Substitute known I

Cycle resistance for RTD I

5.

Steam Generator Pressure Indication

a.

Check(!.)

Quarterly

a.

Compare independent *

(PI-0751E) pressure readings (PI-0752E)

b.

Calibrate Refueling

b.

Apply known pressure I

Cycle to pressure sensor I

6.

Steam Generator Level Indication

a.

Check(!)

Quarterly

a.

Compare independent I

(LI-0757C) level readings I

(LI-0758C)

b.

Calibrate Refueling

b.

Apply known differential I

Cycle pressure to level sensor I

4-86 Proposed OC0888-0093-NL02-NL04