ML18093A269
| ML18093A269 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/23/1987 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML18093A268 | List: |
| References | |
| NUDOCS 8707310147 | |
| Download: ML18093A269 (10) | |
Text
ENCLOSURE 2
EMERGENCY CORE COOLING SYSTEMS ECCS SUBSYSTEMS -T avg 350°F LIMITING CONDITION FOR OPERATION 3.5.2 Two independent ECCS subsystems shall be OPERABLE with each subsystem comprised of the following injection systems: a. One OPERABLE centrifugal charging pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each Reactor Coolant System (RCS) cold leg. b. One OPERABLE safety injection pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. c. One OPERABLE residual heat removal pump and associated residual heat removal heat exchanger and flow path capable of taking suction from the refueling water storage tank on a safety injection signal and transferring suction to the containment sump during the recirculation phase of operation and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. APPLICABILITY:
MO DES 1, 2 and 3. ACTION: a. With one ECCS subsystem inoperable, restore the inoperable subsystem 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 HOT SHUTOOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. b. In the event the ECCS is actuated and injects water into the Reactor Coolant System, a Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 90 days describing the circumstances of the actuation and the total accumulated actuation cycles to date. c. With both ECCS subsystems inoperable for surveillance testing, restore at least one subsystem to OPERABLE status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in at least HOT STANCBY 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 at least HOT SHUTOOWN within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and at least COLD SHUTOOWN within the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. SALEM -UNIT 1 3/4 5-3 e EMERGENCY CORE COOLING SYSTEMS SURVEILIJ\NCE REQUIREMENTS 4.5.2 a. 1. 2. b. Each ECCS subsystem shall be demonstrated OPERABLE:
At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by: Verifying that the following valves are in the indicated positions .with power to the valve operators removed: Valve Number Valve Function Valve Position a. 1 SJ 69 a. RHR pump suction a. open b. 1 SJ 30 b. SI pump suction b. open c. 11 SJ 40 c. SI discharge to c. closed hot legs d. 12 SJ 40 d. SI discharge to d. closed hot legs e. 1 RH 26 e. RHR discharge to e. closed hot legs f. 11 SJ 49 f. RHR discharge to f. open cold legs g. 12 SJ 49 g. RHR discharge to g. open cold legs h. 1 cs 14# h. Spray additive tank h. open discharge
- k. 1 SJ 68 k. SI reci re. line k. open isolation 1
- 11 SJ 44 1. Containment sump l
- closed isolation valve m. 12 SJ 44 m. Containment sump m. closed isolation valve Verifying that the following valves are in the indicated positions:
Valve Number Valve Function Valve Position a. 11 RH 19 a. RHR crosstie valve a. open b. 12 RH 19 b. RHR crosstie valve b. open At least once per 31 days by: 1. verifying that each valve (manual, power operated or automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is in its correct position.
- 2. Verifying that the ECCS piping is full of water by venting the ECCS pump casings and accessible discharge piping high points. # If inoperable, the applicable Technical Specification is 3.6.2.2. SA LEM -UNIT 1 3/4 5-4 EMERGENCY CORE COOLING SYSTEMS ECCS SUBSYSTEMS -T avg < 350°F 3.5.3 As a minimum, one ECCS subsystem#
comprised of the following shall be OPERABLE:
- a. One OPERABLE centrifugal charging pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each Reactor Coolant System (RCS) cold leg. b. One OPERABLE residual heat removal pump and associated residual heat removal heat exchanger and flow path capable of taking suction from the refueling water storage tank on a safety injection signal and transferring suction to the containment sump during the recirculation phase of operation and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. APPLICABILITY:
MO DE 4. ACTION: a. With no ECCS subsystem OPERABLE because of the inoperability of either the centrifugal charging pump or the flow path from the refueling water storage tank, restore at least one ECCS subsystem to OPERABLE status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in COLD SHUTDOWN within the next 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br />. b. With no ECCS subsystem OPERABLE because of the inoperability of either the residual heat removal heat exchanger or residual heat removal pump, restore at least one ECCS subsystem to OPERABLE status or maintain the Reactor Coolant System Tavg less than 350°F by use of alternate heat removal methods. c. In the event the ECCS is actuated and injects water into the Reactor Coolant System, a Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 90 days describing the circumstances of the actuation and the total accumulated actuation cycles to date. #A maximum of one safety injection pump or one centrifugal charging pump shall J be OPERABLE whenever the temperature of one or more of the RCS cold legs is less than or equal to 312°F. NOTE: This particular restriction also applies } in MODE 5 and 6. SA LEM -UN IT 1 3/4 5-6 I EMERGENCY CORE COOLING SYSTEMS BASES ECCS SUBSYSTEMS (Continued)
With the RCS temperature below 350°F, one OPERABLE ECCS subsystem is acceptable without single failure consideration on the basis of the stable reactivity condition of the reactor and the limited core cooling requirements.
The Surveillance Requirements provided to ensure OPERABILITY of each component ensures that at a minimum, the assumptions used in the safety analyses are met and that subsystem OPERABILITY is maintained.
Surveillance requirements for throttle valve position stops and flow balance testing provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper flow resistance and pressure drop in the piping system to each injection point is necessary to: (1) prevent total pump flow from exceeding runout conditions when the system is in its minimum resistance configuration, (2) provide the proper flow split between injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.
Each ECCS subsystem supplies all four cold legs to satisfy minimum flow requirements.
I j SA LEM -UN IT 1 B 3/4 5-la ENCLOSURE 3
CORE ECCS SUBSYSTEMS -T avg 350°F LIMITING CONDITION FOR OPERATION 3.5.2 Two independent ECCS subsystems shall be OPERABLE with each subsystem comprised of the following injection systems: a. One OPERABLE centrifugal charging pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each Reactor Cool ant System (RCS) cold leg. b. One OPERABLE safety injection pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. c. One OPERABLE residual heat removal pump and associated residual heat removal heat exchanger and flow path capable of taking suction from the refueling water storage tank on a safety injection signal and transferring suction to the containment sump during the recirculation phase of operation and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. APPLICABILITY:
MODES 1, 2 and 3. ACTION: a. With one ECCS subsystem inoperable, restore the inoperable subsystem 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 HOT SHUT OOWN within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />. b. In the event the ECCS is actuated and injects water into the Reactor Coolant System, a Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9o2 within 90 days describing the circumstances of the actuation and the total accumulated actuation cycles to date. The current value of the usage factor for each affected safety injection nozzle shall be provided in this Special Report whenever its value exceeds 0.70. c. With both ECCS subsystems inoperable for surveillance testing, restore at least one subsystem to OPERABLE status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in at least HOT STANIBY 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 at least 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 at least COLD SHUTDOWN within the subsequent 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. SA LEM -UNIT 2 3/4 5-3
-
CORE COO<LING ITEMS SURVEILLANCE REQUIREMENTS 4.5.2 Each ECCS subsystem shall be demonstrated OPERABLE:
- a. At least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> by: 1. Verifying that the following valves are in the indicated positions with power to the valve operators removed: Valve Number Valve Function Valve Position a. 2 SJ 69 a. RHR .pump suction a. open b. 2 SJ 30 b. SI pump suction b. open c. 21 SJ 40 c. SI discharge to c. closed hot legs d. 22 SJ 40 d. SI discharge to d. closed hot legs e. 2 RH 26 e. RHR discharge to e. closed hot legs f. 21 SJ 49 f. RHR discharge to f. open cold legs g. 22 SJ 49 g. RHR discharge to g. open cold legs h. 2 cs 14# h. Spray additive tank h. open discharge
- k. 2 SJ 68 k. SI recirc. line k. open isolation l
- 21 SJ 44 l
- Containment sump 1. closed isolation valve m. 22 SJ 44 m. Containment sump m. closed isolation valve 2. Verifying that the following valves are in the indicated positions:
Valve Number Valve Function Valve Position a. 21 RH 19 a. RHR crosstie valve a. Open b. 22 RH 19 b. RHR crosstie valve b. Open b. At least once per 31 days by: 1. Verifying that each valve (manual, power operated or automatic) in the flow path that is not locked, sealed, or otherwise secured in position, is in its correct position.
- 2. Verifying that the ECCS piping is full of water by venting the ECCS pump casings and accessible discharge piping high points. # If inoperable, the applicable Technical Specification is 3.6.2.2. SALEM -UNIT 2 3/4 5-4
,. EMERGENCY CORE COO LING SYSTEMS ECCS SUBSYSTEMS
-Tavg < 350°F LIMITING CONDITION FOR OPERATION 3.5.3 As a minimum, one ECCS subsystem#
comprised of the following shall be OPERABLE:
- a. One OPERABLE centrifugal charging pump and associated flow path capable of taking suction from the refueling water storage tank and residual heat removal pump discharge piping and; 1. Discharging into each Reactor Coolant System (RCS) cold leg. b. One OPERABLE residual heat removal pump and associated residual heat removal heat exchanger and flow path capable of taking suction from the refueling water storage tank on a safety injection signal and transferring suction to the containment sump during the recirculation phase of operation and; 1. Discharging into each RCS cold leg, and; 2. Discharging into two RCS hot legs. APPLICABILITY:
MO DE 4. ACTION: a. With no ECCS subsystem OPERABLE because of the i noperabi 1 ity of either the centrifugal charging pump or the flow path from the refueling water storage tank, restore at 1 east one ECCS subsystem to OPERABLE status within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or be in COLD SHUTOOWN within the next 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br />. b. With no ECCS subsystem OPERABLE because of the inoperability of either the residual heat removal heat exchanger or residual heat removal pump, restore at least one ECCS subsystem to OPERABLE status or maintain the Reactor System Tavg less than 350°F by use of alternate heat removal methods. c. In the event the ECCS is actuated and injects water into the Reactor Coolant System, a Special Report shall be prepared and submitted to the Commission pursuant to Specification 6.9.2 within 90 days describing the circumstances of the actuation and the total accumulated actuation cycles to date. The current value of the usage factor for each affected safety injection nozzle shall be provided in this Special Report whenever its value exceeds 0.70. #A maximum of one safety injection pump or one centrifugal charging pump shall be OPERABLE whenever the temperature of one or more of the RCS cold legs is less than or equal to 312°F. NOTE: This particular restriction also applies in MODES 5 and 6. SA LEM -UN IT 2 3/4 5-7 EMERGENCY CORE COOLING SYSTEMS BASES ECCS SUBSYSTEMS (Continued)
With the RCS temperature below 350°F, one OPERABIE ECCS subsystem is acceptable without single faflure consideration on the basis of the stable reactivity condition of the reactor and the limited core cooling requirements.
The limitation for a maximum of one safety injection pump or one centrifugal charging pump to be OPERABLE and the Surveillance Requirement to verify all safety injection pumps except the allowed OPERABIE safety injection pump to be inoperable below 312°F provides assurance that a mass addition pressure transient can be relieved by the operation of a single POPS relief valve. The Surveillance Requirements provided to ensure OPERABILITY of each component ensures that at a minimum, the assumptions used in the safety analyses are met and.that subsystem OPERABILITY is maintained.
Surveillance requirements for throttle valve position stops and flow balance testing provide assurance that proper ECCS flows will be maintained in the event of a LOCA. Maintenance of proper flow resistance and pressure drop in the piping system to each injection point is necessary to: (1) prevent total pump flow from exceeding runout conditions when the system is in its minimum resistance configuration, (2) provide the proper flow split between injection points in accordance with the assumptions used in the ECCS-LOCA analyses, and (3) provide an acceptable level of total ECCS flow to all injection points equal to or above that assumed in the ECCS-LOCA analyses.
Each ECCS subsystem supplies all four cold legs to satisfy minimum flow requirements.
3/4.5.4 BORON INJECTION SYSTEM The OPERABILITY of the boron injection system as part of the ECCS ensures that sufficient negative reactivity is injected into the core to counteract any positive increase in reactivity caused by RCS system cooldown.
RCS cooldown can be caused by inadvertant depressurization, a loss-of-coolant accident or a steam line rupture. The limits on injection tank minimum contained volume and boron concentration ensure that the assumptions used in the steam line break analysis are met. The contained water volume limit includes an allowance for water not usable because of tank discharge line location or other physical characteristics.
The OPERABILITY of the redundant-heat tracing channels associated with the boron injection system ensure that the solubility of the boron solution will be maintained above the solubility limit of 137°F at 22,500 ppm boron. SA LEM -UN IT 2 B 3/4 5-2