ML20204J968

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Proposed Tech Specs Incorporating New TS for Atmospheric Steam Relief Valve Instrumentation & Revising TS 3.7.1.6 Re Atmospheric Steam Relief Valves
ML20204J968
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 03/22/1999
From:
HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20204J957 List:
References
NUDOCS 9903300198
Download: ML20204J968 (14)
v • d • e


Text

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NOC-AE-00G462 Page 1 of 14 1

ATTACHMENT 5 TECHNICAL SPECIFICATION PROPOSED NEW PAGE OR MARKED-UP PAGE CHANGES 4

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NOC-AE-000462 Page 2 of 14 PROPOSED CH ANGES TO TECHNICAL SPECIFICATIONS The Technical Specification and Technical Specification Bases pages listed below are proposed as new pages or as marked-up pages to identify the proposed changes associated with this. submittal and are enclosed in this attachment.

Pages:

Marked up index page vi Marked up index page xiii New page 3/4 3-85 New page 3/4 3-86 New page 3/4 3-87 Marked up page 3/4 7-10 Marked up page B 3/4 3-6 Marked up page B 3/4 7-3 o

0 INDEX LIMinNG CONDITIONS FOR OPERATION AND SURVEILLANCE REQUIREMENTS SECTION PAGE Meteorological Instmmentation.............................

3/4 3-58 TABLE 3.3-8 METEOROLOGICAL MONITORING INSTRUMENTATIGN......

3/4 3-59 TABLE 4.3-5 METEOROLOGICALMONITORINGINSTRUMENTATION SURVEILLANCE REQUIREMENTS.........................

3/4 3-60 Remote Shutdown System.................. '..............

3/4 3-61 TABLE 3.3-9 REMOTE SHUTDOWN SYSTEM,.........................

3/4 3-62 TABLE 4.3-6 REMOTE SHUTDOWN MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS.........................

3/4366 Accident Monitoring Instrumentation.........................

3/4 3-67 TABLE 3.3-10 ACCIDENT MONITORING INSTRUMENTATION............

3/4 3-68

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TABLE 4.3-7 ACCIDENTMONITORINGINSTRUMENTATION SURVEILLANCE REQUIREMENTS.........................

3/43-73 Chemical Detection Systems..............................

3/4 3-75 TABLE 3.3-11 (This table number is not used)...........................

3/4 3-77 Radioactive Liquid Effluent Monitor instumentation DELETED TABLE 3.3-12 RADIOACTIVE LlOUlD EFFLUENT MONITORING INSTRUMENTATION DELETED TABLE 4.3-8 RADIOACTIVE LIQUID EFFLUENT MONITORING INSTRUMENTATION SURVEILLANCE REQUIREMENTS DELETED Explosive Gas MonitorRn9 Instmmentation...................

3/4 3-79 TABLE 3.3-13 EXPLOStVE GAS MONITORING INSTRUMENTATION.......

3/4 3-80 TABLE 4.3-9 EXPLOSIVE GAS MONITbRING INSTRUMENTATION SURVEILLANCE REQUIREMENTS.........................

3/4 3-82 3/4.3.4 (This specification number is not used)

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SOUTH TEXAS -UNITS 1 & 2 vi Unit 1 - Amendment No. 47;99.101 Unit 2 - Amendment No. 06;06,88

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Proposed Insert to index Page vi 1

lasert 1 3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE I N STR U M ENTATION.............................................

3/4385 TABLE 3.3-14 ATMOSPHERIC STEAM RELIEF VALVE I NSTR UM ENTATION............................................

3/4386 I-l 1

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INDEX BASES P.Agig SECTION 8 3/4 0-1 3/4.0 APPLICABILITY............................................

3/4.1 REACTIVITY CONTROL. SYSTEMS S3/41-1 3/4.1.1 BORATION CONTROL.....................................

B 3/412 3/4.1.2 BORATION SYSTEMS......................................

83/41-3 3/4.1.3 MOVABLE CONTROL ASSEMBLIES...........................

B 3/4 2-1 3/4.2 POWER DISTRIBUTION LIMITS................................

B 3/4 2-1 3/4.2.1 AXIAL FLUX DIFFERENCE..................................

3/4.22 and3/4.2.3 HEATFLUXHOTCHANNELFACTORand B 3/4 2-2 NUCLEAR ENTHALPY RISE HOT CHANNEL FACTOR............

FIGURE B 3/42-1 TYPICAL INDICATED AXIAL FLUX DIFFERENCE VERSUS

,B 3/4 2-3 THERMAL POWER........................................

B 3/4 2-5 3/42.4 QUADRANT POWER TILT RATIO.............................

l B 3/4 2 5 3/4.2.5 DNB PARAMETERS.......................................

3/4.3 INSTRUMENTATION 3/4.3.1 and 3/4.32 REACTOR TRIP SYSTEM and ENGINEERED SAFETY B 3/4 3 1 FEATURES ACTUATION SYSTEM INSTRUMENTATION..........

B 3/4 3 3 3/4.3.3 MONITORING INSTRUMEUATION...........................

l 3/4.3.4 (This specification number is not used)

QtuoT "lj 3/4.4 REACTOR OOOLANT SYSTEM B 3/4 4-1 3/4.4.1 REACTOR COOUWT LOOPS AND COOLANT CIRCULATION......

8 3/4 4-1 3/4.42 SAFETY VALVES..........................................

B 3/4 4-2 3/4:4.3 PRESSURIZER...........................................

83/44-2 3/4.4.4 RELIEF VALVES..........................................

B 3/4 4-2 3/4.4.5 STEAM GENERATORS.....................................

B 3/4 4-3 3/4A.6 REACTOR COOLANT SYSTEM LEAKAGE......................

B 3/4 4-4 3/4.4.7 CHEMISTRY.............................................

B3/4.4-5 3/4A.8 SPECIFIC ACTIVITY.......................................

SOUTHTEXAS-UNITS 1 & 2 wil Unit 1 - Amendment No.- 101 Unit 2-Amendment No. 88

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Proposed Insert to index Page xiii 4

Insert 2 4

3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE l

INSTR UMENTATION............................................. B 3/4 3 6

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INSTRUMENTATION 3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE INSTRUMENTATION LIMITING CONDITION FOR OPERATION:

3.3.5.1 The atmospheric' steam relief valve instrumentation shown in Table 3.3-14 shall be OPERABLE.

APPLICABILITY: As shown in Table 3.3-14 ACTION: As shown in Table 3.3 SURVEILLANCE REQUIREMENTS:

e 4.3.5.1 Perform a CHANNEL CAllBRATION on each atmospheric steam relief valve automatic actuation channel at a setpoint of 1225 psig at least once every 18 months.

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2BLE 3.3-14 (Continued)

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TABLE NOTATIONS I

When steain generators are being used for decay heat removal.

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  1. Atmospheric steam relief valve (s) may be in manual operation and open to maintain secondary side pressure at or below an indicah.d steam generator pressure of 1225 psig.

1 ACTION STATEMENTS ACTION 1 - With the number of OPERABLE channe;s less than the required number of channels, declare the affected valve (s) inoperable and I

apply Technical Specification 3.7.1.6.

ACTION 2 - a.

With one less than the required number of OPERABLE channels, restore the inoperable channel to OPERABLE status within 7 days; or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

b.

With two less than the required number of OPERABLE channels, restore at least three channels to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />; or be in at least HOT STANDBY within the j

next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

1 SOUTH TEXAS - UNITS 1 &2 3/4 3-87

PLANT SYSTEMS l

ATMOSPHERIC STEAM RELIEF VALVES l

LIMITING CONDITION FOR OPERATION

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3.7.

6 At,least four atmospheric steam relief valves (and associated marida controls shall be OPERABLE.

APPLICABILITY: H0 DES 1, 2, 3, and 4.*

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ACTION:

a.

With one less than the required atmospheric steam relief valves OPERABLE, j

restora the required atmospheric steam relief valves to OPERABLE status within 7 days; or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and place the required RCS/

i RHR loops in operation for decay heat removal.

b.

With two less than the required atmospheric relief valves OPERABLE, re-store at least three atmospheric relief valves to OPERABLE status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and in HOT SHUTDOWN within the folicwing 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and place the required RCS/RHR loops in operation for decay. heat removal.

SURVEILLANCE RESUIREMENTS 4.7.1.6 Each atmospheric relief valvd(iind associated manual control 11 be demonstrated OPERABLE prior to startup following anytreruelina shutdown _ orf T by verifying that all valves will open and l

COLD SHUTOOWN of 30 day @s or longe:

close f,ully by operatio f manual controls.

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SOUTH TEXAS - UNITS 1 & 2 3/4 7-10 Unit 1 - Amendment No. 4 L

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INSTRUMENTATI'ON I

BASES 3/4.3.3.6 ACCIDENT MONITORING INSTRUMENTATION (Continued) quadrant. The unit specific response to item II.F.2 of NUREG 0737 further discusses the core exit thermocouples. Two sets of two~thermocouples ensure a single falbre will not disable the ability to determine the radial temperature gradient. The subcooling margin monitor requirements are not affected by allowing 2 thermocouples/ channel / quadrant as long as each channel has at least four operable thermocouples in any quadrant (e.g., A Train has four operable thermocouples in one of the quadrants, and C Train has four operable thermocouples in the same quadrant or any other quadrant.). This preserves the ability to withstand a single failure.

3/4.3.3.7 (Not Used) 3/4.3.3.8 (Not Used) 3/4.3.3.9 (Not,U_ggil 3/4.3.3.10 DELETED j

3/4.3.3.11 EXPLOSIVE GAS MONITO' RING INSTRUMENTATION

' This instrumentation includes provisions for monitoring (and controlling) the concentrations of potentially explosive gas mixtures in the GASEOUS WASTE PROCESSING SYSTEM.

3/4.3.4 (Not Used) 1 SOUTH TEXAS - UNITS 1 & 2 B 3/4 3-6 Unit 1 - Amendment No. 47,70.77,101 Unit 2 - Amendment No. 66;65;66,88

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Proposed insert to Technical Specification Bases Page B 3/4 3-6 Insert 3 3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE INSTRUMENTATION The atmospheric steam relief valve manual controls must be OPERABLE in Modes 1,2,3, and 4 (Mode 4 when steam generators are being used for decay heat removal) to allow operator action needed for decay heat removal and safe cooldown in accordance with Branch Technical Position RSB 5-1.

The atmospheric steam relief valve automatic controls must be OPERABLE with an indicated setpoint of 1225 psig in Modes 1 and 2 because the safety analysis assumes automatic operation of the atmospheric steam relief valves 1

with an indicated setpoint of 1225 psig with uncertainties for mitigation of the small break LOCA. In order to support startup and shutdown activities (including post refueling low power physics testing), the atmospheric steam relief valves may be operated in manual and open in Mode 2 to maintain the secondary side pressure at or below an indicated steam generator pressure of 1225 psig.

The uncertainties in the safety analysis assume a channel calibration on each atmospheric steam relief valve automatic actuation channel, including verification of automatic actuation at the 1225 psig setpoint, every 18 months.

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-PLANT SYSTEMS BASES 3 /4.7.1. 6 ATMOSPHERIC STEAM RELIEF VALVES The atmospheric steam relief valves are required for decay heat removal and safe cooldown-in accordance with Branch Technical Position RSB 5-1.

In the safety analyses, operation of the atmospheric steam relief valves is assumed'in accident analyses for mitigation of small break LOCA, feedwater line break, loss of normal feedwater and loss-of-offsite power, c g

3 /4.7.1.7 FEEDWATER ISOLATION VALVES hMN N The OPERABILITY of the feedwater isolation valves ensures that no more than one steam generator will blow down in the event of a steam line or feedwater line rupture. The operability of the Feedwater Isolation valves will minimize the positive reactivity effects of the Reactor Coolant System cooldown associated with the blowdown, and limit the pressure r.1se within containment. The OPERABILITY of the feedwater isolation valves within the closure times of the Surveillance Requirements are consistent with the assumptions used in the safety analysis.

i 3 /4.7.2 S(EAM GENERATOR PRESSURE / TEMPERATURE LIMITATION The limitation on steam generator pressure and temperature ensures that the pressure-induced stresses in the steam generators do not exceed the maximum allowable fracture toughness stress limits. The limitations of 70*F and 200 psig are based on a steam generator RT of 10*F and are sufficient m

to prevent brittle fracture.

3 /4.7.3 COMPONENT COOLING WATER SYSTEM The OPERABILITY of the Component Cooling Water System ensures that sufficient cooling capacity is available for continued operation of safety-related equipment during normal and accident conditions. The redundant cooli.ng capacity of this system, assuming a single failure, is consistent with the assumptions used in the safety analyses.

3/4.7.4 ESSENTIAL COOLING WATER SYSTEM The OPERABILITY of the Essential Cooling Water System ensures that sufficient cooling capacity is available for continued operation of safety-I related equipment during normal and ac.cident conditions. The redundant cooling cap.acity of this system, assuming a single failure, is consistent with the assumptions used in the safety analyses.

When a risk-important system or component (for example Essential Cooling Water) is tak'e'n out of service, it is important to assure that the tm' pact on plant risk of this and other equipment simultaneously taken out of service can a assessed. The Configuration Risk Management Program evaluates the impact SOUTH TEXAS - UNITS 1 & 2 B 3/4 7-3 Unit 1 - Amendment No. M,85

' Unit 2 - Amendment No. 9,72

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Proposed insert to Technical Specification Bases Page B 3/4 7-3, Section 3/4.7.1.6, Atmospheric Steam Relief Valves Insert 4 The atmospheric steam relief valve manual controls must be OPERABLE in Modes 1,2,3, and 4 (Mode 4 when steam generators are being used for decay heat removal) to allow operator action needed for decay heat removal and safe cooldown in accordance with Branch Technical Position RSB 5-1.

The atmospheric steam relief valve automatic controls must be OPERABLE with an indicated setpoint of 1225 psig in Modes 1 and 2 because the safety analysis assumes automatic operation of the atmospheric steam relief valves with an indicated setpoint of 1225 psig with uncertainties for mitigation of the small break LOCA. In order to support startup and shutdown activities

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(including post-refueling low power physics testing), the atmospheric steam relief valves may be operated in manual and open in Mode 2 to maintain the secondary side pressure at or below an indicated steam generator pressure of 1225 psig.

The verification that all atmospheric steam relief valves will open and close fully prior to startup following a COLD SHUTDOWN of 30 days or longer, or following any refueling shutdown, allows for operation using either manual or automatic controls, i

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