ML20236X973
| ML20236X973 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 09/22/1978 |
| From: | DUQUESNE LIGHT CO. |
| To: | |
| Shared Package | |
| ML20236X976 | List: |
| References | |
| TAC-10837, NUDOCS 8712100459 | |
| Download: ML20236X973 (2) | |
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PROPOSED REVISION POWER DISTRIBUTION LIMITS SURVEILLANCE REQUIREMENTS (Continued)
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b) At least once per 31 EFPD, whichever occurs first.
2.
When the F C is less than or equal to the FRTP limit for theappropbatemeasuredcoreplane,additi!nalpower C
distribution maps shall be taken and F compared to F[fP andFhatleastonceper31EFPD x
e.
The F limits for RATED THERMAL POWEP.within specific core xy planes shall be:
i Fhf11.71forallcoreplanescontainingbank"D" 1.
control rods and/or any part length rods, and 2.
For unrodded core plane:
Fxy 1 1.68 up to 2.4 ft. elevation, Fxy 1 1.75 from 2.4 ft. elevation up to 7.8 ft. elevation, Fxy 1 1.63 above 7.8 ft. elevation f.
The F limits of e, above, are not applicable in the following xy core plane regions as measured in percent of core height from the bottom of the fuel:
1.
Lower core region from 0 to 15%, inclusive.
2.
Upper core regicn from 85 to 100% inclusive.
3.
hid ru.ne regions at 17.8 1 2%, 32.1 1 2%,
46.3 3 2%, 60.6 1 2% and 74.9 1 2%, inclusive.
4.
Core plane regions within i 2% of core height (1 2.88 inches) about the bank demand position of the bank "D" or part length control rods.
C exceedingFh:
g.
With Fx 1.
The F (Z) limit shall be reduced at least 1% for each q
exceedsFh,AND 1% F x
xy 2.
The effects of F on F (Z) shall be evaluated to determine ifF(Z)iswithbitskimit.
q 4.2.2.3 When Fq(Z) is measured pursuant to Specification 4.10.2.2, an overall measured Fq(Z) shall be obtained from a power distribution map and increased by 3% to account for manufacturing tolerances and further increased by 5% to account for measurement uncertainty.
l B""8712100459 780922 3/4 2-6a nmtn_m"1 PDR ADOCK 05000334 P
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PROPOSED REVISION POWER DISTRIBUTION' LIMITS NUCLEARENTHALPYHOTChANNELFACTOR-dH LIMITING CONDITION FOR 0PERATION 3.2.3 NH shall be limited by the following relationship:
FfH 1 1.5355 [1.0 + 0.2 (1-P)]
, p, THERMAL POWER RATED THERMAL POWER APPLICABILITY: MODE 1 ACTION:
N Where F exceeding its a~
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j AH a.
Reduce THERMAL POWER to less than 50% of RATED TPJ.RyAL POWER WITHIN 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and reduce the Power Range Neutron Flux-High Trip Setpoints to 1 55% 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 />, I
Demonstrate thru in-core mapping that F is within its limit b.
within24hoursafterexceedingthelimkH 1
t or reduce THERMAL j
POWER to less than 5% of RATED THERMAL POWER within the next 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />, and I
Identify and correct the cause of the out of limit condition c.
prior to increasing THERMAL POWER; subsequent POWER OPERATION l
y may proceed provided that RAH is demonstrated through in-core l
mapping to be within its limit at a nominal 50% of RATED THERMAL POWER prior to exceeding this THERMAL POWER, at a nominal 75%
RATED THERMAL POWER prior to exceeding this THERMAL power and within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after attaining 95% or gre.ater RATED THERMAL
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POWER.
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BEAVER VALLEY - UNIT 1 3/4 2-8 L_________________-______
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