ML18092B307
| ML18092B307 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 10/03/1986 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML18092B306 | List: |
| References | |
| NUDOCS 8610100780 | |
| Download: ML18092B307 (3) | |
Text
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POWER DISTR lB UT ION LIM ITS SURVEILLANCE REQUIREMENTS_ (Continued) b)
At least once per 31 EFPD,. whic_hever occurs first.
C RTP
- 2.
When the Fxy is less than or equal to the Fxy limit for the appro~riate measured core plane, additional power distribution maps C
RTP L
shall be taken and Fxy compared to Fxy and Fxy at least once per 31.EFPD.
- RTP e *. The Fxy limit for Rated Thermal Power (Fxy) shall be provided for all core planes containing bank 11 0 11 control rods and al_l unrodded core planes in a Radial Peaking Factor Limit Report per specification 6.9.1.9.
- f.
The Fxy limits of e, above, are not applicable -in the following core plane regions as measured in percent of core height from the bottom of
- the fuel~
- 1.
Lower core reg~ on from O to 15% inclusive.
- 2.
Upper core region from 85 to 100% inclusive.
3.* Grid plane regions at 17.8 + 2%, 32.1 + 2%, 46.4 + 2%,
60.6 + 2% and 74.9 + 2% inclusive.
- 4.
Core plane regions within+ 2% of core height (+ 2.88 inches) about the bank demand position of the bank 11 0 11 control rods *.
- g.
Evaluating the effects of Fxy on Fq(Z) to determine if. Fq(Z) is*
c-L is within its limit whenever Fxy exceeds Fxy*
SA LEM -
UN IT 1 3/4 2-7 Amendment No.
8610100780 861003 PDR ADOCK 05000272 p
~
I POWER
- a.
abnormal perturbations in the radial power shape, such as from rod 111isalignment, effect FN..6H more directly than FQ,
- b.
although *rod movement has a direct influence upon limiting FQ to within its limit, such control is not readily available to limit FNAH, and
. c. errors in prediction for control power shape detected during startup physics test can be compensated for in FQ by restricting axial flux distributions. This compensation for FNAH is less readily available.
The radial peaking factor Fxy(z) is measured periodically to provide assurance that the hot channel factor, FQ(z), remains within its-limit. The Fxy limit for Rated Thermal Power (F ~Tl), as prov1 ded 1 n ihe Radial Peaking Factor Limit J
Report per specification 6. 9.1. 9, was determined from expected power control manueuvers over the full range of burnup con di ti ons in the core *
. 3/4 2.4-QUAlRANT POWER TILT RATIO The quadrant power tilt ratio limit assures that the radial power -
distribution satisfies the design values u~ed in the power capability analysis.
Radial power distribution measurements are made during startup testing and
-*periodically during power operation.*
The limit of 1.02 at.which corrective action is required provides DNB and linear heat generation rate protection with x-y plane *power tilts. A limiting tilt of 1.025 can be tolerated before the margin for.uncertainty in FQ is
- depleted~ The limit of 1.02 was selected to provide an allowance for the
. uncertaintYassociated with the indicated power tilt.
The two hour time allowance for operation with a tilt conditi~n greater than 1.02 but less than 1.09 is provided to-allow identification and correction of a dropped or misaligned rod.
In the e~ent such action does not correct the tilt, the. margin for uncertainty_ on Fq is reinstated by reducing the power by 3 percent from RATED THERMAL POWER for each percent of tilt in excess of 1.0.
SALEM - UNIT 1 B 3/4 2-5 Amendment No.
r
- .\\.,
~
POWER DISTRIBUTION LIM ITS BASES
- a.
abnormal perturbations 1n the radial power shape, such as from rod misalignment, effect F~H more directly than FQ,
- b.
although rod mov~ment has a direct influence upon limiting FQ to within its limit, such control is not readily available to limit FN~, and
- c. errors in prediction for control power shape detected during startup physics test can be compensated*for in FQ by restricting axial flux distributions. This.compensation.for FNAH is less readily available.
The radial peaking factor Fxy(z) is measured periodically to provide assurar:iGe that the hot channel factor, FQ(z), remains within its limit.*
The Fxy limit.
for Rated Th.ermal Power (FfJ~, as provided in.the Radial Peaking Factor Limit Report-per specification 6.9.1.9, was determined from expected power control manueuvers over the full range of burnup conditions in the core.
3/4 2.4 QUA!:RANT POWER TILT RATIO The quadrant power tilt ratio limit assur:es that the radial power distribution satisfies the design values used in the power capability analysis.
Radial power,distribution measurements are made during startup testing and periodically during power operation.
The limit of 1.02 at which corrective action is required provides DNB and linear heat*generation rate protection with x-y plane power tilts. A limiting tilt of 1.025 can be tolerated before the margin for uncertainty in FQ is depleted. The limit of 1.02 was selected to provide i!n allowance.for the uncertainty associated with the indicated power tilt.
The two hour time allowance for operation with a tilt condition greater than 1.02 but less than 1.09 is provided to allow identification and correction of a dropped or misaligned rod.
In the event such action does not correct the tilt, the margin for uncertainty on F Q is reinstated by reducing the power by 3 percent fromRATEDTHERMAL*POWER for each percent of tilt in.excess of 1.0.
SALEM - UNIT 1 B 3/4 2-5 Amendment No.
J