ML050120075
| ML050120075 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 12/28/2004 |
| From: | NRC/NRR/DLPM |
| To: | |
| Jaffe D, NRR/DLPM, 415-1439 | |
| References | |
| TAC MC0822, TAC MC0823, TAC MC4596, TAC MC4597 | |
| Download: ML050120075 (2) | |
Text
POWER DISTRIBUTION LIMITS 3/4.2.4 QUADRANT POWER TILT RATIO LIMITING CONDITION FOR OPERATION 3.2.4 The QUADRANT POWER TILT RATIO shall not exceed 1.02.
APPLICABILITY:
MODE 1, above 50% of RATED THERMAL POWER*.
ACTION:
With the QUADRANT POWER TILT RATIO determined to exceed 1.02:
- a.
Within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> reduce THERMAL POWER at least 3% from RATED THERMAL POWER for each 1% of indicated QUADRANT POWER TILT RATIO in excess of 1 and similarly reduce the Power Range Neutron Flux-High Trip Setpoint within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
- b.
Within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> and every 7 days thereafter, verify that Fa(Z) (by F,,, evaluation) and FN H are within their limits by performing Surveillance Requirements 4.2.2.2 and 4.2.3.2. THERMAL POWER and setpoint reductions shall then be in accordance with the ACTION statements of Specifications 3.2.2 and 3.2.3.
SURVEILLANCE REQUIREMENTS 4.2.4.1 The QUADRANT POWER TILT RATIO shall be determined to be within the limit above 50% of RATED THERMAL POWER by:
- a.
Calculating the ratio at least once per 7 days when the alarm is OPERABLE, and
- b.
Calculating the ratio at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> during steady-state operation when the alarm is inoperable.
4.2.4.2 The QUADRANT POWER TILT RATIO shall be determined to be within the limit when above 75% of RATED THERMAL POWER with one Power Range channel inoperable by using the movable incore detectors to confirm indicated QUADRANT POWER TILT RATIO 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 either:
- a.
Using the four pairs of symmetric thimble locations, or
- b.
Using the movable incore detection system to monitor the QUADRANT POWER TILT RATIO with a full incore map.
- See Special Test Exceptions Specification 3.10.2.
SOUTH TEXAS - UNITS 1 & 2 3/4 2-10 Unit 1 - Amendment No. 167 Unit 2 - Amendment No. 156
PLANT SYSTEMS ATMOSPHERIC STEAM RELIEF VALVES LIMITING CONDITION FOR OPERATION 3.7.1.6 At least four atmospheric steam relief valves shall be OPERABLE.
APPLICABILITY:
MODES 1, 2, 3, and 4.*
ACTION:
- a.
With one less than the required atmospheric steam relief valves OPERABLE, restore 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/RHR loops in operation for decay heat removal.
- b.
With two less than the required atmospheric relief valves OPERABLE, restore 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 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/RHR loops in operation for decay heat removal.
SURVEILLANCE REQUIREMENTS 4.7.1.6 Each atmospheric relief valve shall be demonstrated OPERABLE prior to startup following any COLD SHUTDOWN of 30 days or longer or following any refueling shutdown, by verifying that all valves will open and close fully by operation of automatic# and manual controls.
- When steam generators are being used for decay heat removal.
" Required to be met for automatic controls only in MODES 1 and 2.
I I
Unit 1 - Amendment No. 444, 167 Unit 2 - Amendment No. 404, 156 SOUTH TEXAS - UNITS 1 & 2 3/4 7-10