ML19254D224
| ML19254D224 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 10/09/1979 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19254D220 | List: |
| References | |
| NUDOCS 7910230148 | |
| Download: ML19254D224 (1) | |
Text
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POWER DISTRIBUTION LIMITS 3/4.2.2
- DRM SETPOINTS LIMITING CONDITION FOR OPERATION 3.2.2 The flow biased APRM scram trip setpoint (S) and rod block trip set-point (SRB) shall be established according to the following relationships:
S 1 (0.66W + 54%) T S
1 (0.66W + 42%) T RB where: S and SeB are in percent of RATED THERMAL POWER, W = LooE recirculation flaw in percent of rated flow, T = Lowest value of the ratio of design TPF divided by the MTPF obtained for any class of fuel in the core (T 1 1.0),and Design TPF for: 8 x BR fuel = 2.48 7x7 fuel = 2.60 8x8 fuel = 2.45 APPLICABILITY: CONDITION 1, when THERMA POW"R > 25% of RATED THERMAL POWER.
ACTION:
With S or S exceeding the allowable value, initiate corrective action within 15 m utes and continue corrective action so that S and S are within the required limits within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or reduce THERMAL 80WEgB to less than 25% of RATED Tl:dRMAL POWER within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
SURVEILLANCE REOUIREMENTS 4.2.2 The MTPF for each class of fuel shall be determined, the value of T calculated, and the flow biased nPRM trip setpoint adjusted, as required:
a.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, b.
Whenever THERMAL POWER has been increased by at least 15% of RATED THERMAL POWER and steady state operating conditions have been established, and Initially and at least once per 12 hcurs when the reactor is c.
operating with a LIMITING. CONTROL RCD PATTERN for MTPF.
BRUNSWICK - UNIT 2 3/4 2-9 Amendment No. 48
- " 30lW
- 739 39
POWER DISTRIBUTION LIMITS 3/4.2.3 MINIMUM CRITICAL POWER RATIO LIMITING CONDITION FOR OPERATION 3.2.3 The MINIMUM CRITICAL POWER RATIO (MCPR), as a function of core flow, shall be equal to or greater than MCPR times the K shown in f
Figure 3.2.3-1, for a.
Beginning-of-cycle (BOC) to end-of-cycle (E0C) minus 2000 MWD /t, with:
1.
MCPR for 7x7 fuel = 1.20,*
2.
MCPR for 8x8 fuel = 1.21, 3.
MCPR for 8x8R fuel = 1.26.
b.
EOC minus 2000 MWD /t to E0C, with:
1.
MCPR for 7x7 fuel = 1.21,*
2.
MCPR for 8x8 and 8x8R fuel = 1.27.
APPLICABILITY: CONDITION 1, when THERMAL POWER > 25% RATED THERMAL POWER ACTION:
With MCPR less than the applicable limit determined from Figure 3.2.3-1, initiate corrective action within 15 minutes and continue corrective action so that MCPR is equal to or greater than the applicable limit within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> or reduce THERMAL POWER to less than 25% of RATED THERMAL POWER within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.
SURVEILLANCE REQUIREMENTS 4.2.3 MCPR shall be determined to be equal to or greater than the applicable limit determined from Figure 3.2.3-1:
a.
At least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />, b.
Whenever THERMAL POWER has been increased by at least 15%
of RATED THERMAL POWER and steady state operating conditions have been established, and c.
Initially and at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> when the reactor is operating with a LIMITING CONTROL R0D PATTERN for MCPR.
- For 7x7 fuel assemblies, the K factor is based.i the 112% flow f
curve of Figure 3.2.3-1 rather than the actual setpoint of 102.5%.
BRUNSWICK - UNIT 2 3/4 2-10 Amendment No. 48 1189 240