ML041340193

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Technical Specifications, Change Technical Specification to Modify Requirements Applicable When Action Requires No Positive Reactivity Additions
ML041340193
Person / Time
Site: Calvert Cliffs  Constellation icon.png
Issue date: 05/06/2004
From: Vissing G
NRC/NRR/DLPM/LPD1
To: Vanderheyden G
Calvert Cliffs
References
TAC MB8478, TAC MB8479
Download: ML041340193 (25)
v • d • e


Text

Wide Range Logarithmic Neutron Flux Monitor Channels 3.3.12 3.3 INSTRUMENTATION 3.3.12 Wide Range Logarithmic Neutron Flux Monitor Channels LCO 3.3.12 Two channels of wide range logarithmic neutron flux monitoring instrumentation shall be OPERABLE.

APPLICABILITY: MODES 3, 4, and 5, with the reactor trip circuit breakers open or Control Element Assembly Drive System not capable of Control Element Assembly withdrawal.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more required A.1 Suspend all Immediately channels inoperable. operations that involve positive reactivity additions that are not accounted for in the calculated SDM.

AND A.2 Perform SDM 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> verification in accordance with AND SR 3.1.1.1.

Once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter CALVERT CLIFFS - UNIT 1 3.3.12-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

Wide Range Logarithmic Neutron Flux Monitor Channels 3.3.12 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.3.12.1 Perform CHANNEL CHECK. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.3.12.2 Perform CHANNEL FUNCTIONAL TEST. Once within 7 days prior to each reactor startup SR 3.3.12.3 -------------------NOTE-------------------

Neutron detectors are excluded from CHANNEL CALIBRATION.

Perform CHANNEL CALIBRATION. 24 months CALVERT CLIFFS - UNIT 1 3.3.12-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 3 3.4.5 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.5 RCS Loops - MODE 3 LCO 3.4.5 Two RCS loops shall be OPERABLE and one RCS loop shall be in operation.

NOTES-------------

1. All reactor coolant pumps may be not in operation for

< 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period and < 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> per 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period for low flow testing, provided:

a. No operations are permitted that would cause introduction of coolant into the RCS with boron concentration less than required to meet the SDM of LCO 3.1.1; and
b. Core outlet temperature is maintained at least 10'F below saturation temperature.
2. No reactor coolant pump shall be started with any RCS cold leg temperature < 3650 F (Unit 1), < 301OF (Unit 2) unless:
a. The pressurizer water level is
  • 170 inches;
b. The pressurizer pressure is < 300 psia (Unit 1),

< 320 psia (Unit 2); and

c. The secondary water temperature of each steam generator is < 300 F above the RCS temperature.

APPLICABILITY: MODE 3.

CALVERT CLIFFS - UNIT 1 3.4.5-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 3 3.4.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One required RCS loop A.1 Restore required RCS 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> inoperable. loop to OPERABLE status.

B. Required Action and B.1 Be in MODE 4. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time of Condition A not met.

C. No RCS loop OPERABLE. C.1 Suspend operations Immediately that would cause OR introduction of coolant into the RCS No RCS loop in with boron operation. concentration less than required to meet the SDM of LCO 3.1.1.

AND C.2 Initiate action to Immediately restore one RCS loop to OPERABLE status and operation.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.5.1 Verify required RCS loop is in operation. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> CALVERT CLIFFS - UNIT 1 3.4.5-2 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

RCS Loops - MODE 3 3.4.5 SURVEILLANCE REQUIREMENTS (continued)

SURVEILLANCE FREQUENCY SR 3.4.5.2 Verify secondary side water level in each 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> steam generator > -50 inches.

SR 3.4.5.3 Verify correct breaker alignment and 7 days indicated power available to the required pump that is not in operation.

CALVERT CLIFFS - UNIT 1 3.4.5-3 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 4 3.4.6 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.6 RCS Loops - MODE 4 LCO 3.4.6 Two loops consisting of any combination of RCS loops and shutdown cooling (SDC) loops shall be OPERABLE and at least one loop shall be in operation.

NOTES----------------------------

1. All reactor coolant pumps and SDC pumps may be not in operation for < 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period, provided:
a. No operations are permitted that would cause introduction of coolant into the RCS with boron concentration less than required to meet the SDM of LCO 3.1.1; and
b. Core outlet temperature is maintained at least 100F below saturation temperature.
2. No reactor coolant pump shall be started with any RCS cold leg temperature < 3650 F (Unit 1), < 301OF (Unit 2) unless:
a. Pressurizer water level is < 170 inches;
b. Pressurizer pressure is < 300 psia (Unit 1),

< 320 psia (Unit 2); and

c. Secondary side water temperature in each steam generator is < 300F above the RCS temperature.

APPLICABILITY: MODE 4.

CALVERT CLIFFS - UNIT 1 3.4.6-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 4 3.4.6 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One required RCS loop A.1 Initiate action to Immediately inoperable. restore a second loop to OPERABLE status.

AND Two SDC loops inoperable.

B. One required SDC loop B.1 Be in MODE 5. 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> inoperable.

AND Two required RCS loops inoperable.

C. Required RCS or SDC C.1 Suspend operations Immediately loops inoperable. that would cause introduction of OR coolant into the RCS with boron No RCS or SDC loops concentration less in operation. than required to meet the SDM of LCO 3.1.1.

AND C.2 Initiate action to Immediately restore one loop to OPERABLE status and operation.

CALVERT CLIFFS - UNIT 1 3.4.6-2 Amendment No. 266 CALVERT CLIFFS. - UNIT 2 Amendment No. 243

RCS Loops - MODE 5, Loops Filled 3.4.7 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.7 RCS Loops - MODE 5, Loops Filled LCO 3.4.7 One shutdown cooling (SDC) loop shall be OPERABLE and in operation, and either:

a. One additional SDC loop shall be OPERABLE; or
b. The secondary side water level of each steam generator (SG) shall be 2 -50 inches.

NOTES----------------------------

1. The SDC pump of the loop in operation may be not in operation for c 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period provided:
a. No operations are permitted that would cause introduction of coolant into the RCS with boron concentration less than required to meet the SDM of LCO 3.1.1; and
b. Core outlet temperature is maintained at least 100 F below saturation temperature.
2. One required SDC loop may be inoperable for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing provided that the other SDC loop is OPERABLE and in operation.
3. No reactor coolant pump shall be started with any RCS cold leg temperature
  • 3651F (Unit 1),
  • 3010 F (Unit 2) unless:
a. The pressurizer water level is
  • 170 inches;
b. Pressurizer pressure is
  • 300 psia (Unit 1),

< 320 psia (Unit 2); and

c. The secondary side water temperature in each SG is

< 300F above the RCS temperature.

CALVERT CLIFFS - UNIT 1 3.4.7-1 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No. 24 3

RCS Loops - MODE 5, Loops Filled 3.4.7

4. All SDC loops may be not in operation during planned heatup to MODE 4 when at least one RCS loop is in operation.

APPLICABILITY: MODE 5 with RCS loops filled.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One SDC loop A.1 Initiate action to Immediately inoperable. restore a second SDC loop to OPERABLE AND status.

Any SG with secondary OR side water level not within limit. A.2 Initiate action to Immediately restore SG secondary side water levels to within limits.

B. Required SDC loops B.1 Suspend operations Immediately inoperable. that would cause introduction of OR coolant into the RCS with boron No SDC loop in concentration less operation. than required to meet the SDM of LCO 3.1.1.

AND B.2 Initiate action to Immediately restore one SDC loop to OPERABLE status and operation.

CALVERT CLIFFS - UNIT 1 3.4.7-2 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

RCS Loops - MODE 5, Loops Filled 3.4.7 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.7.1 Verify one SDC loop is in operation. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.7.2 Verify required SG secondary side water 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> level is > -50 inches.

SR 3.4.7.3 Verify correct breaker alignment and 7 days indicated power available to the required SDC loop components that are not in operation.

CALVERT CLIFFS - UNIT 1 3.4.7-3 - Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 5, Loops Not Filled 3.4.8 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.8 RCS Loops - MODE 5, Loops Not Filled LCO 3.4.8 Two shutdown cooling (SDC) loops shall be OPERABLE and one SDC loop shall be in operation.

NOTES---------------

1. All SDC pumps may be not in operation for < 15 minutes when switching from one loop to another provided:
a. The core outlet temperature is maintained at least 100 F below saturation temperature;
b. No operations are permitted that would cause introduction of coolant into the RCS with boron concentration less than required to meet the SDM of LCO 3.1.1; and
c. No draining operations to further reduce the RCS water volume are permitted.
2. One SDC loop may be inoperable for < 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing provided the other SDC loop is OPERABLE and in operation.

APPLICABILITY: MODE 5 with RCS loops not filled.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One SDC loop A.1 Initiate action to Immediately inoperable. restore SDC loop to OPERABLE status.

CALVERT CLIFFS - UNIT 1 3.4.8-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

RCS Loops - MODE 5, Loops Not Filled 3.4.8 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. Required SDC loops B.1 Suspend operations Immediately inoperable. that would cause introduction of OR coolant into the RCS with boron No SDC loop in concentration less operation. than required to meet the SDM of LCO 3.1.1.

AND B.2 Initiate action to Immediately restore one SDC loop to OPERABLE status and operation.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.8.1 Verify one SDC loop is in operation. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> SR 3.4.8.2 Verify correct breaker alignment and 7 days indicated power available to the required SDC loop components that are not in operation.

CALVERT CLIFFS - UNIT 1 3.4.8-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

STE RCS Loops - MODES 4 and 5 3.4.17 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.17 Special Test Exception (STE) RCS Loops - MODES 4 and 5 LCO 3.4.17 The reactor coolant circulation requirements of LCO 3.4.6, "RCS Loops-MODE 4," LCO 3.4.7, "RCS Loops-MODE 5, Loops Filled," and LCO 3.4.8, "RCS Loops-MODE 5, Loops Not Filled" may be suspended during the time intervals required: 1) for local leak rate testing of containment penetration number 41 pursuant to the requirements of the Containment Leakage Rate Testing Program; and 2) to permit maintenance on valves located in the common shutdown cooling suction line or on the shutdown cooling flow control valve (CV-306) provided:

a. Xenon reactivity is < 0.1% Ak/k and is approaching stability;
b. No operations are permitted which could cause introduction of coolant into the RCS with boron concentration less than that required to meet the minimum boron concentration of LCO 3.9.1;
c. The charging pumps are deenergized and the charging flow paths are closed; and
d. The SDM requirement of LCO 3.1.1 is verified every 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.

APPLICABILITY: MODES 4 and 5.

CALVERT CLIFFS - UNIT 1 3.4.17-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

STE RCS Loops - MODES 4 and 5 3.4.17 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One or more A.1 Suspend activities Immediately requirements of the being performed under Limiting Condition this Special Test for Operation not Exception.

met.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.17.1 Verify xenon reactivity is within limits. Once within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> prior to suspending the reactor coolant circulation requirements of LCO 3.4.6, LCO 3.4.7, and LCO 3.4.8 SR 3.4.17.2 Verify charging pumps de-energized. 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SR 3.4.17.3 Verify charging flow paths isolated. 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> SR 3.4.17.4 Perform SR 3.1.1.1. 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> CALVERT CLIFFS - UNIT 1 3.4.17-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

AC Sources-Shutdown 3.8.2 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. (Continued) A.2.3 Suspend operations Immediately involving positive reactivity additions that could result in loss of required SDM or boron concentration.

AND A.2.4 Initiate action to Immediately restore required offsite power circuit to OPERABLE status.

B. One required DG B.1 Suspend CORE Immediately inoperable. ALTERATIONS.

AND B.2 Suspend movement of Immediately irradiated fuel assemblies.

AND B.3 Suspend operations Immediately involving positive reactivity additions that could result in loss of required SDM or boron concentration.

AND CALVERT CLIFFS - UNIT 1 3.8.2-3 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

AC Sources-Shutdown 3.8.2 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. (Continued) B.4 Initiate action to Immediately restore required DG to OPERABLE status.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.2.1 ------------------- NOTE-------------------

The following Surveillance Requirements (SRs) are not required to be performed:

SR 3.8.1.11, SR 3.8.1.12, and SR 3.8.1.14.

For the LCO 3.8.2.a and LCO 3.8.2.b AC In accordance sources required to be OPERABLE, the SRs of with applicable Specification 3.8.1, "AC Sources-Operating," SRs except SR 3.8.1.4, SR 3.8.1.8, SR 3.8.1.10, SR 3.8.1.13, 3.8.1.15, and SR 3.8.1.16, are applicable.

SR 3.8.2.2 For the LCO 3.8.2.c and LCO 3.8.2.d AC In accordance sources required to be OPERABLE, the SRs with applicable required by SR 3.8.1.16, are applicable. SRs CALVERT CLIFFS - UNIT 1 3.8.2-4 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

DC Sources-Shutdown 3.8.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.2 Suspend movement of Immediately irradiated fuel assemblies.

AND A.2.3 Suspend operations Immediately I involving positive reactivity additions that could result in loss of required SDM or boron concentration.

AND A.2.4 Initiate action to Immediately restore required DC electrical power subsystems to OPERABLE status.

CALVERT CLIFFS - UNIT 1 3.8.5-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

Inverters-Shutdown 3.8.8 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME A. (continued) A.2.3 Suspend operations Immediately involving positive reactivity additions that could result in loss of required SDM or boron concentration.

AND A.2.4 Initiate action to Immediately restore required inverters to OPERABLE status.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.8.8.1 Verify correct inverter voltage and 7 days alignment to required AC vital buses.

CALVERT CLIFFS - UNIT 1 3.8.8-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

Distribution Systems-Shutdown 3.8.10 ACTIONS (continued)

CONDITION I REQUIRED ACTION I COMPLETION TIME A. (continued) A.2.2 Suspend movement of Immediately irradiated fuel assemblies.

AND A.2.3 Suspend operations Immediately involving positive reactivity additions that could result in loss of required SDM or boron concentration.

AND A.2.4 Initiate actions to Immediately restore required AC, DC, and AC vital bus electrical power distribution subsystems to OPERABLE status.

AND A.2.5 Declare associated Immediately required shutdown cooling subsystem(s) inoperable and not in operation.

CALVERT CLIFFS - UNIT 1 3.8.10-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

Nuclear Instrumentation 3.9.2 3.9 REFUELING OPERATIONS 3.9.2 Nuclear Instrumentation LCO 3.9.2 Two source range monitors (SRMs) shall be OPERABLE.

APPLICABILITY: MODE 6.

ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One required SRM A.1 Suspend CORE Immediately inoperable. ALTERATIONS.

AND A.2 Suspend operations Immediately that would cause introduction of coolant into the RCS with boron concentration less than required to meet the boron concentration of LCO 3.9.1.

B. Two required SRMs B.1 Initiate action to Immediately inoperable. restore one SRM to OPERABLE status.

AND B.2 Perform SR 3.9.1.1. Once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> CALVERT CLIFFS - UNIT 1 3.9.2-1 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

SDC and Coolant Circulation-High Water Level 3.9.4 3.9 REFUELING OPERATIONS 3.9.4 Shutdown Cooling (SDC) and Coolant Circulation-High Water Level LCO 3.9.4 One SDC loop shall be OPERABLE and in operation.

NOTES---------------

1. The required SDC loop may be not in operation for

< 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> per 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period, provided no operations are permitted that would cause introduction of coolant into the Reactor Coolant System with boron concentration less than that required to meet the minimum boron concentration of LCO 3.9.1.

2. The shutdown cooling pumps may be removed from operation during the time required for local leak rate testing of containment penetration number 41 pursuant to the requirements of SR 3.6.1.1 or to permit maintenance on valves located in the common SDC suction line, provided:
a. no operations are permitted that would cause introduction of coolant into Reactor Coolant System with boron concentration less than that required to meet the minimum boron concentration of LCO 3.9.1,
b. CORE ALTERATIONS are suspended, and
c. all containment penetrations are in the status described in LCO 3.9.3.

APPLICABILITY: MODE 6 with the water level 2 23 ft above the top of the irradiated fuel assemblies seated in the reactor vessel.

CALVERT CLIFFS - UNIT 1 3.9.4-1 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

SDC and Coolant Circulation-High Water Level 3.9.4 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One required SDC loop A.1 Initiate action to Immediately inoperable or not in restore SDC loop to operation. OPERABLE status and operation.

AND A.2 Suspend operations Immediately that would cause introduction of coolant into the RCS with boron concentration less than required to meet the boron Immediately concentration of LCO 3.9.1.

AND A.3 Suspend loading of irradiated fuel 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> assemblies in the core.

AND A.4 Close all containment penetrations providing direct access from containment atmosphere to outside atmosphere.

CALVERT CLIFFS - UNIT 1 3.9.4-2 Amendment No. 266 CALVERT CLIFFS - UNIT 2 Amendment No. 243

SDC and Coolant Circulation-Low Water Level 3.9.5 3.9 REFUELING OPERATIONS 3.9.5 Shutdown Cooling (SDC) and Coolant Circulation-Low Water Level LCO 3.9.5 Two SDC loops shall be OPERABLE, and one SDC loop shall be in operation.

NOTES----------------------------

1. One SDC loop may be replaced by one spent fuel pool cooling loop provided it is lined up to provide cooling flow to irradiated fuel in the reactor core and the core heat generation rate is less than the heat removal capacity of the spent fuel cooling loop.
2. One required SDC loop may be inoperable for up to 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> for surveillance testing, provided that the other SDC loop is OPERABLE and in operation.
3. All SDC pumps may be de-energized for < 15 minutes when switching from one train to another provided:
a. The core outlet temperature is maintained > 10OF below saturation temperature;
b. No operations are permitted that would cause introduction of coolant into the Reactor Coolant System with boron concentration less than that required to meet the minimum boron concentration of LCO 3.9.1; and
c. No draining operations to further reduce Reactor Coolant System water volume are permitted.

APPLICABILITY: MODE 6 with the water level < 23 ft above the top of the irradiated fuel assemblies seated in the reactor vessel.

CALVERT CLIFFS - UNIT 1 3.9.5-1 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

SDC and Coolant Circulation-Low Water Level 3.9.5 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. One SDC loop A.1 Initiate action to Immediately inoperable. restore SDC loop to OPERABLE status.

OR A.2 Initiate action to Immediately establish 2 23 ft of water above the top of irradiated fuel assemblies seated in the reactor vessel.

B. No SDC loop OPERABLE B.1 Suspend operations Immediately or in operation. that would cause introduction of coolant into the RCS with boron concentration less than required to meet the boron concentration of LCO 3.9.1.

AND B.2 Initiate action to Immediately restore one SDC loop to OPERABLE status and to operation.

AND CALVERT CLIFFS - UNIT 1 3.9.5-2 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

SDC and Coolant Circulation-Low Water Level 3.9.5 ACTIONS (continued)

CONDITION REQUIRED ACTION COMPLETION TIME B. (Continued) B.3 Close all 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> containment penetrations providing direct access from containment atmosphere to outside atmosphere.

SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.9.5.1 Verify required SDC loops are OPERABLE and 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> one SDC loop is in operation.

SR 3.9.5.2 Verify SDC loop in operation is circulating 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> reactor coolant at a flow rate of

> 1500 gpm.

SR 3.9.5.3 Verify correct breaker alignment and 7 days indicated power available to the required SDC loop components that are not in operation.

CALVERT CLIFFS - UNIT 1 3.9.5-3 Amendment No.266 CALVERT CLIFFS - UNIT 2 Amendment No.243

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