ML20080S363
| ML20080S363 | |
| Person / Time | |
|---|---|
| Site: | Grand Gulf  |
| Issue date: | 02/27/1984 |
| From: | MISSISSIPPI POWER & LIGHT CO. |
| To: | |
| Shared Package | |
| ML20080S361 | List: |
| References | |
| NUDOCS 8402290013 | |
| Download: ML20080S363 (1) | |
Text
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POWER DISTRIBUTION LIMITS 3/4.2.2 APRM SETPOINTS LIMITING COWITION FOR OPERATION 3.2.2 The APRM flow biased simulated thermal power-high scram trip setpoint (5) and flow biased neutron flux-upscale control r-A block trip setpoint (5g) shall be established according to the following relatioaships:
Trip Setpoint Allowable Value 5 < (0.66W + 485)T 5 < (0.664 + SIX)T S ~ $ (0.66W + 455)T Sg 1 (0.66W + 425)T g
where:
5 and S are in percent of RATED THEMAL POWER.
g W = Loop recirculation flow as a percentage of the loop recirculation flow which produces a rated core flow of 112.5 million Ibs/hr.
. T = Lowest value of the ratio of FRACTION OF RATED THERMAL POWER (FRTP) divided by the MAXIMUM FRACTION OF LIMITING POWER DENSITY (WLPD). T is alwRys less than or equal to 1.0.
APPLICABILITY: OPERATIONAL CONDITION 1, when THERMAL POWER is greater than or equal to 253 of RATED THERMAL POWER.
ACTION:
With the APRM flow biased simulated themal power-high scram trip setpoint and/
or the flow biased neutron flux-upscale control rod block trip setpoint less conservative than the value shown in the allowable value-column for 5 5 and/or 5 to within the required limits
- within4; hours or reduce THERMAL l
l POWER to ins than 255 of RATED THERHAL 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 The FRTP AND WLPD for each class of fuel shall be detemined, the value 4.2.2 of T calculated, and the most recent actual APRM flow biased simulated thermal power-high scram and flow biased neutron flux-wscale control rod block trip satpcir.ts verified to be within the above limits or adjusted, as rec;uired:
l 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 />, Within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> after completion of a THERMAL POWER increase of at b.
least ISE of RATED THERMAL POWER, and 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 c.
with W LPD greater than or equal to FETP.
= ith W LF9 greater than the FRTP during power ascension up to 905 of RATED WTEMAL POWER, rather than adjusting the APIDI setpoints, the APRM gain mRy be adjusted such that APRM readings are greater than or equal to 2005 times WLPD provided that the adjusted APRM reading does not exceed 100K of RATED THERMAL POWER, ^2: 7:;rir;d i;;ir. ;2j ;17:.t fr r: :r.t 2;;; r.;; ;;;;;d I"" ;7 "/."::
-4 HEN and a notice of adjustment is posted on the reactor control panel.
8402290013 840227 PDR ADOCK 05000416 P
PDR l
GRA M SULF-INIIT 1 3/4 2-5
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