ML023330304

Technical Specifications, Extension of Surveillance Calibration Interval for Area Temperature Monitoring Instrumentation of Main Steam Valve Vault

ML023330304
Person / Time
Site:	Browns Ferry
Issue date:	11/26/2002
From:	Jabbour K NRC/NRR/DLPM/LPD2
To:	Scalice J Tennessee Valley Authority
References
TAC MB6196, TAC MB6197
Download: ML023330304 (4)

Text

Primary Containment Isolation Instrumentation 3.3.6.1 Table3.

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Reactor Water Cleanup (RWCU) System Isolation

a.

Main Steam Valve Vault Area Temperature - High

b.

Pipe Trench Area Temperature - High

c.

Pump Room A Area Temperature - High

d.

Pump Room B Area Temperature - High

e. Heat Exchanger Room Area (West Wall)

Temperature - High f

Heat Exchanger Room Area (East Wall)

Temperature - High

g.

SLC System Initiation

h.

Reactor Vessel Water Level - Low Level 3

6.

Shutdown Cooling System Isolation

a.

Reactor Steam Dome Pressure - High b

Reactor Vessel Water Level - Low, Level 3 c

Drywell Pressure - High 1-2,3 1-2,3 1,2,3 1,2,3 12,3 SR 33 t, 1 2 SR 336. I.

SR 336 1 o SR I3 6

SR 336 I 4 SR b 1 6 SR 316 I 2 SR 33 6 1 4 SR 3 36 I 6 SR 3.3 1L2 SR 3.3.6 1 4 SR 33.6 1 6 SR 33.61.2 SR 3. 3.6.1.4 SR 13,36 L 6 336 1 2 KR 3.3.6.1.4 SR 3.3.6 I 6 1.2 1,2.3 II SR 313A6I.6 SR SR SR SR 3.36. 1.1 33612 33.615 33616 F

SR 336.12 SR 33 61 5 SR 33 6 16 1

SR 3.361.1 SR 13.6.1.2 SR 33.6.1.5 SR 3.3.6.1.6 F

SR 3.3.6.1.2 SR

.3. 6. 1 SR 3.3.6.I.6 1.2,3 3.3-61 Amendment No. 253, 25, 26-0, 277

< 1 5-17

< 12

• 143 F

• 170- F N A

> 528 inche.

aho e N essel zero

< 115 psig

> 528 inche, abov e vessel zero

< 2.5 ps5g (a)

One SLC System Initiation signal provides logic input to close both RWCU valves.

(b)

Only one channel per trip system required in MODES 4 and 5 when RHR Shutdown Cooling System integrity maintained.

i(a)

BFN-UNIT 2

Primary Containment Isolation Instrumentation B 3.3.6.1 BASES APPLICABLE SAFETY ANALYSES, LCO, and APPLICABILITY (continued) 1.d. Main Steam Tunnel Temperature - High (TS-1-17A-D, 29A-D, 40A-D, 54A-D)

The Main Steam Tunnel Temperature Function is provided to detect a leak in the RCPB and provides diversity to the high flow instrumentation. The isolation occurs when a very small leak has occurred. If the small leak is allowed to covtinue without isolation, offsite dose limits may be reached. However, credit for these instruments is not taken in any transient or accident analysis in the FSAR, since bounding analyses are performed for large breaks, such as MSLBs.

Main Steam Tunnel temperature signals are initiated from twelve bimetallic temperature switches and four temperature elements located in the areas being monitored. The four temperature elements monitor the Main Steam Valve Vault area. Sixteen channels of Main Steam Tunnel Temperature High Function are required to be OPERABLE to ensure that single instrument failure can preclude the isolation function.

no The main steam tunnel temperature detection system Allowable Value is chosen to detect a leak equivalent to between 1% and 10% rated steam flow.

This Function isolates the Group 1 valves excluding the Recirculation Loop Sample valves.

(continued)

BFN-UNIT 2 B 3.3-201 Amendment No. 277 Revision 0

Primary Containment Isolation Instrumentation 3.3.6.1 Tal-le 3.

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5 Reactor Water Cleanup (RWCU) System Isolation

a.

Main Steam Valve Vault Area Temperature - High

b.

Pipe Trench Area Temperature - High c

Pump Room A Area Temperature - High d

Pump Room B Area Temperature - High

e.

Heat Exchanger Room Area (West Wall)

Temperature - High f

Heat Exchanger Room Area (East Wall)

Temperature - High

g.

SLC System Initiation

h.

Reactor Vessel Water Level - Low, Level 3

6.

Shutdown Cooling System Isolation

a. Reactor Steam Dome Pressure - High

b.

Reactor Vessel Water Level - Low, Level 3

c.

Drywell Pressure - High SR 3.36 1.

SR 311 6.

1 SR 1 6. 1. 2 S R

• .3.6.1.4 SR 13 6 6

1.2.3 1.2.3 1.2.3 1,2,3 1.2 1.2,3

[.2.3 F

SR 336.1.2 SR 33 6 1.4 SR Ih 1,6 F

SR SR SR 3

3 6I2 33614 33616 SR 3..6 1.2 SR 33.6.1.4 SR 1.3.6[1.6 F

SR SR SR

• 3.6. 1.4 3.3.6 1 6 ft SR 136.1.6 SR 33 6 1 1 SR 3 61 2 S

3 6.1. 5 SR 116 1 6 SR 3.3.6.1.2 SR 3.36.1.

SR 33 6 IA6 SR SR SR SR 1,2.3 3.1.6.1.1 3.6 1.2 3.316. 1.5ý

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SR 1.3.612 SR 33.6 15 SR 33 616 3.3-61 Amendment No. 212, 213, 219, 236

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< 141^F

< 17()I F

> 52ý inches zero

< I I 15p g

> 528 inchlc.

abov h'

cssel iero

< 2.5ý psig (a)

One SLC System Initiation signal provides logic input to close both RWCU valves.

(b)

Only one channel per trip system required in MODES 4 and 5 when RHR Shutdown Cooling System integrity maintained.

2

,(a) 2 BFN-UNIT 3

Primary Containment Isolation Instrumentation B 3.3.6.1 BASES APPLICABLE 1.d. Main Steam Tunnel Temperature - High SAFETY ANALYSES, (TS-1-17A-D, 29A-D, 40A-D, 54A-D)

LCO, and APPLICABILITY The Main Steam Tunnel Temperature Function is provided to (continued) detect a leak in the RCPB and provides diversity to the high flow instrumentation. The isolation occurs when a very small leak has occurred. If the small leak is allowed to continue without isolation, offsite dose limits may be reached. However, credit for these instruments is not taken in any transient or accident analysis in the FSAR, since bounding analyses are performed for large breaks, such as MSLBs.

Main Steam Tunnel temperature signals are initiated from twelve bimetallic temperature switches and four temperature elements located in the areas being monitored. The four temperature elements monitor the Main Steam Valve Vault area. Sixteen channels of Main Steam Tunnel Temperature High Function are required to be OPERABLE to ensure that no single instrument failure can preclude the isolation function.

The main steam tunnel temperature detection system Allowable Value is chosen to detect a leak equivalent to between 1 % and 10% rated steam flow.

This Function isolates the Group 1 valves excluding the Recirculation Loop Sample valves.

(continued)

Amendment No. 24-*

236 B 3.3-201 BFN-UNIT 3