ML20235M550

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Corrected Amend 4 to License NPF-76,combining Units 1 & 2 Tech Specs to Add Requirement Which Places Positive Displacement Pump in lock-out Condition During Modes 4,5 & 6 to Prevent Cold Overpressurization
ML20235M550
Person / Time
Site: South Texas STP Nuclear Operating Company icon.png
Issue date: 02/17/1989
From:
NRC
To:
Shared Package
ML20235M548 List:
References
NUDOCS 8902280311
Download: ML20235M550 (14)
v • d • e


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  • e 2.0 SdFETYLIMITSANDLIMITINGSAFETYSYSTEMSETTINGS _

2.1 SAFETY LIMITS REACTOR CORE 2.1.1 The combination of THERMAL POWER, pressurizer pressure, and the h'ghest operating Figure loop coolant temperature (T,y9) shall not exceed the limits shown in 2.1-1.

APPLICABILITY: MODES 1 and 2.

ACTION:

Whenever the point defined t'y the combination of the highest operating loop average temperature and THERMAL POWER t.as exceeded the appropriate pressurizer pressure line, be in HOT STANDBY within I hour, and comply with the require-ments of Specification 6.7.1.

REACTOR COOLANT SYSTEM PRES $URE 2.1.2 The Reactor Coolant System pressure shall not exceed 2735 psig.

APPLICABILITY: MODES 1, 2, 3, 4, and 5.

ACTION.

. MODES 1 and 2:

Whenever the Reactor Coolant System pressure has exceeded 2735 psig, be in HOT STANDBY with the Reactor Coolant System pressure within its limit within I hour, and comply with the requirements of Specification 6.7.1.

MODES 3, 4 and 5:

Whenever the Reactor Coolant System pressure has exceeded 2735 psig, reduce the Reactor Coolant System pressure to within its limit within 5 minutes, and comply with the regt.f rements of Specification 6.7.1.

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REACTOR CORE SAFETY LIMIT - FOUR LOOPS IN OPERATION SOUTH TEXAS - UNITS 1 & 2 2-2 Unit I Amendment No. 4 u

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REACTIVITY CONTROL SYSTEMS CONTROL R00 INSERTION LIMITS LIMITING CONDITION FOR OPiRATION 3.1.3.6 The control banks shall be limited in physical insertion as shown in Figure 3.1-3.

APPLICABILITY: MODES 1* and 2* **.

ACTION:

With the control banks itserted beyond the above insertion limits, except for surveillance, testing persuant to Specification 4.1.3.1.2:

a.

Restore the control banks to within the limits within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, or

b. l Reduce THERMAL POWER withir. 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> to less than or equal to that i

fraction of RATED THERMAL POWER which is allowed by the bank posi-tion using the above figure, or

c. Se.,in at least' HOT STANDBY within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.

SURVEILLANCE REQUIREMENTS 4.1.3.6 The position of each control bank shall be determined to be within the insertion limits at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> except during time intervals  !

when the rod insertion limit monitor.is inoperable, then verify the individual rod positions at Itast once per 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />. .

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  • See Special 1est Exceptions Specifications 3.10.2 and 3.10.3.
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FIGURE 3.1-3 ROD BANK INSERTION LIMITS VERSUS THERMAL POWER FOUR-LOOP OPERATION SOUTH' TEXAS - UNITS 1 & 2 3/4 1-24 Unit 1 Amendment No. 4 1

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,- POWER DISTRIBUTION LIMITS i

SURVEILLANCE REQUIREMENTS (Continued 1- l ;

pursuant to Specification 4.2.1.3 above or by linear interpolation between the most recently measured value and the predicted value at the end of the cycle l life. The provisions of Specification 4.0.4 are not applicable.

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S0llTH TEXAS - UNITS 1 & 2 3/4 2-4 Unit 1 Amendment No. 4

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d ELECTRICAL POWER SYSTEMS A.C. SOURCES .

SHUTDOWN LIMiliNG CONDITION FOR OPERATION 3.8.1.2 As a minious, the following A.C. electrical power sources shall be OPERABLE:

a. One circuit between the offsite transmission network and the Onsite I Class IE Distribution System, and f
b. Two' standby diesel generators each with a separate fuel tank contain-ing a minimum volume of 60,500 gallons of fuel.

APPLICABILITY: MODES 5 and 6.

ACTION:

With less than the above minimum required A.C. electrical power sources OPERABLE, imediately suspend all operations involving CORE ALTERATIONS, posi-tive reactivity changes, movement of irradiated fuel, or crane operation with loads over the spent fuel pool, and within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, depressurize and vent the Reactor Coolant System through a greater than or equal to 2.0 square inch vent.

- In addition, when in MODE 5 with the reactor coolant loops not filled, or in MODE 6 with the water level less than 23 feet above the reactor vessel flange, imediately initiate corrective action to restore the required sources to OPERABLE status as soon as possible.  !

SURVEILLANCE REQUIREMENTS 4.8.1.2 The above required A.C. electrical power sources shall be dee,onstrated OPERABLE by the performance of each of the requirements of Specifications 4.8.1.1.1, 4.8.1.1.2 (except for Specification 4.8.1.1.2a.3)), and 4.8.1.1.3.

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3/4.8.2 0.C. SOURCES OPERATING I LIMITING CONDITION FOR OPERATION 3.8.2.1 As a minimum, the following D.C. electrical sources shall be OPERABLE:

a. Channel I 125-volt 84ttery Bank EIA11 (Unit 1), E2A11 (Unit 2) and its two associated chargers, (
b. Channel II 125-volt Battery Bank E1D11 (Unit 1), E2D11 (Unit 2) and its associated full capacity charger, (
c. Channel III 125-volt Battery Bank E1811 (Unit 1), E2811 (Unit 2) and l its associated full capacity charger, and ,
d. Channel IV 125-volt Battery Bank E1C11 (Unit 1), E2C11 (Unit 2) and its two associated chargers. l APPLICABILITY: MODES 1, 2, 3, and 4.

ACTION:

a.* With one of the required battery banks, and/or one of the required chargers for the Channels II or III inoperable, restore the inoperable battery bank and/or charger to OPERABLE status within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> or be in at least HOT STANDBY within the next.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br /> 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 />.

- b. With only one charger on Channel I or IV OPERABLE, demonstrate the OPERABILITY of-the associated battery bank by performing Surveillance Requirement 4.8.2.1.a.1) within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and at least once per 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> thereafter. If any Category A limit in Table 4.8-2 is not met, declare -

the battery inoperable. Restore the inoperable charger to OPERABLE status within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 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 COLD SHUTOOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.

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  • S11RVEILLAN.CE REQUIREMENTS 4.8.2.1 Each 175-volt battery bank and charger shall be demonstrated OPERABLE:
a. At least once per 7 days by verifying that:
1) The parameters in Table 4.8-2 meet the Category A limits, and
2) The total battery terminal voltage is greater than or equa) to 129 volts on float charge.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-10 Unit 1 Amendment No. 4

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4-ELECTRICAL POWER SYSTEMS D.C. SOURCES SHUTDOWN LIMITING CONDITION FOR OPERATION 3.8.2.2 As a minimum, Channel I 125-volt Battery Bank EIA11 (Unit 1), E2A11 (Unit 2), and Channel IV 125-volt battery bank E1C11 (Unit 1), E2C11 (Unit 2),

and their two associated chargers shall be OPERABLE.

APPLICABILITY: MODES 5 and 6.

ACTION:

With the required battery banks and/or charger (s) inoperable, immediately sus-pend all operations involving CORE ALTERATIONS, positive reactivity changes, or movement of irradiated fuel; initiate corrective action to restore the required battery banks and/or chargers to OPERABLE status as soon as possible, and within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, depressurize and vent the Reactor Coolant System through a 2.0 square inch vent. ..

SURVEILLANCE REQUIREMENTS 4.8.2.2 The above required 125-volt batte banks and chargers shall be 4 demonstrated OPERABLE in accordance with S cification 4.8.2.1.

l SOUTH TEXAS - UNITS 1 & 2 3/4 8-13 Unit 1 Amendment No. 4 i

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ELECTRICAL POWER' SYSTEMS 3/4.8.3 ONSITE POWER DISTRIBUTION OPERATIE LIMITING CONDITION FOR OPERATION 3.8.3.1 The following electrical busses shall be energized in the specified manner:-

a. Train A A.C.' ESF Busses consisting of:
1) 4160-Volt ESF Bus # E1A (Unit 1), E2A (Unit 2), and
2) 480-Volt ESF Busses # EIA1 and EIA2 (Unit 1), E2A1 and E2A2 (Unit 2) from respective load center transformers.
b. Train B' A.C. ESF Busses consisting of:
1) 4160-Volt ESF Bus # ElB (Unit 1), E2B (Unit 2), and
2) 480-Volt ESF Busses # E181 and E182 (Unit 1), E281 and E282 (Unit 2) from respective load center transformers.
c. Train C A.C. ESF Busses consisting of:
1) 4160-Volt ESF Bus # Elc (Unit 1), E2C (Unit 2), and
2) 480-Volt ESF Busses # E1C1 and E1C2 (Unit 1), E2C1 and E2C2 (Unit 2) from respective load center transformers.
d. 120-Volt A.C. Vital Distribution Panels DP1201 and D9001 energized from their associated inverters connected to D.C. Bus # EIA11*

(Unit 1), E2A11* (Unit 2), '

e. 120-Volt A.C. Vital Distribution Panel DP1202 energized from its associated inverter connected to D.C. Bus # E1011* (Unit 1), E2D11*

(Unit 2),

f. 120-Volt A.C. Vital Distribution Panel DP1203 energized from its associated inverter connected to D.C. Bus # E1811* (Unit 1), E2B11*

(Unit 2),

g.

120-Volta.C.VitalDistributior,PanelsDP1204andDP002 energized from their associated inverters connected to D.C. Bus # E1C11 (Unit 1), E2C11* (Unit 2),  ;

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h. 125-Volt D.C. Bus EIA11 (Unit 1) E2A11 (Unit 2) energized from Battery Bank E1A11 (Unit 1), E2A11 (Unit 2),
1. 125-Volt D.C. Bus E1D11 (UnP. 1) E2D11 (Unit 2) energized from Battery Bank E1011 (Unit 1), E2D11 (Unit 2),
j. 125-Volt D.C. Bus E1811 (Unit 1) E2B11 (Unit 2) energized from Battery Bank E1811 (Unit 1), E2811 (Unit 2), and k.

L 125-Volt D.C. Bus E1C11 (Unit 1) E2C11 (Unit 2) energized from )

Battery Bank E1C11 (Unit 1), E2C11 (Unit 2). -

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  • The inverter (s) associated with one channel may be disconnected from its D.C.
  • bus for up to 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> as necessary, for the purpose of performing an equaliz-ing charge on its associated battery bank provided: (1) its vital distribu-tion panels are energized, and (2) the vital distribution panels associated 3 with the other battery banks are energized from their associated inverters and connected to their associated D.C. busses.

SOUTH TEXAS - UNITS 1 & 2 3/4 8-14 Unit 1 Amendment No. 4 .

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5.0 DESIGN FEATURES 5.1 SITE EXCLUSION AREA 5.1.I' The Exclusion sea shall be as shown in Figure 5.1-1.

LOW POPULATION ZONE-5.1.2 The Low Population Zone shall be as shown in Figure 5.1-2.

MAP DEFINING UNRESTRICTED AREAS AND SITE BOUNDARY FOR RADIOACTIVE GASEOUS AND LIQUID EFFLUENTS 5.1.3 Information regarding radioactive gaseous and liquid eff1 tents, which will. allow identification of structures and release points as well as defini-tion of UNRESTRICTED AREAS within the SITE BOUNDARY that are accessible to MEMBERS OF THE PUBLIC, shall be as shown in Figures 5.1-3 and 5.1-4.

4 The definition of UNRESTRICTED AREA used in implementing these Technical Speci-fications has been expanded over that in 10 CFR 20.3(a)(17). The UNRESTRICTED AREA boundary may coincide with the Exclusion (fenced) Area boundary, as defined in 10 CFR 100.3(a), but the UNRESTRICTED AREA does not include areas over water bodies. The concept of UNRESTRICTED AREAS, established at or beyond the SITE BOUNDAP.Y, is utilized in the Limiting Conditions for Operation to keep levels of radioactive materials in liquid and gaseous effluents as low as is reason-ably achievable, pursuant to 10 CFR 50.35a.

5.2 CONTAINMENT CONFIGURATION 5.2.1 The reactor containment building is a steel-lined, reinforced concrete building of cylindrical shape, with a dome roof and having the following design features:

a. Nominal inside diameter = 150 feet.
b. Nominal inside height = 241.25 feet.
- c. Minimum thickness of concrete walls = 4 feet.
d. Minimum thickness of concrete roof = 3 feet.
e. Minimum thickness of concrete floor sat = 18 feet.
f. Nominal thickness of steel liner = 3/8 inches.
g. Net free volume = 3.56 x los cubic feet.

DESIGN PRESSURE AND TEMPERATURE 5.2.2 The reactor containment building is designed and shall be maintained for a maximum internal pressure of 56.5 psig and a temperature of 286'F.

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