ML20056G552
| ML20056G552 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 08/17/1993 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20056G553 | List: |
| References | |
| NPF-06-A-149 NUDOCS 9309030264 | |
| Download: ML20056G552 (2) | |
Text
r 3/4.1 REACTIVITT CONTROL SYSTEMS 3/4.1.1 BORATION CONTROL i
> 200*F avg LIMITING CONDITION FOR OPERATION 3.1.1.1 The SHUTDOWN MARGIN shall be 25.5% Ak/k.
APPLICABILITY: MODES 1, 2*, 3 and 4.
ACTION:
With the SHUTDOWN MARGIN <5.5% Ak/k, immediately initiate and continue boration at 240 gpm of 2500 ppa boric acid solution or equivalent until-i the required SRUTDOWN MARGIN is restored.
SURVEILLANCE REOUIREMENTS 4.1.1.1.1 The SHUTDOWN MARGIN shall be determined to be 25.5% Ak/k.
t Within one hour after detec' ion of an inoperable CEA(s) and at a.
least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> thereafter while the CEA(s) is inoperable.
If the inoperable CEA is famovable or untrippable, the above required SHUTDOWN MARGIN shall be increased by an amount at least equal to the withdrawn worth of the immovable or untrippable CEA(s).
b.
When in MODES 1 or 2, 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 verifying that CEA group withdrawal is within the Transient Insertion Limits of Specification 3.1.3.6.
c.
When in MODE 2, within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to achieving reactor f
criticality by verifying that the predicted critical CEA position is within the limits of Specification 3.1.3.6.
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d.
Prior to initial operation above 5% RATED THERMAL POWER after each fuel loading, by consideration of the factors of (e) below.
l f
with the CEA groups at the Transient Insertion Limits of
+
Specification 3.1.3.6.
I t
See Special Test Exception 3.10.1.
With K,ff 2 1.0.
6 With K,ff < 1.0.
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i ARKANSAS - UNIT 2 3/4 1-1 Amendment No. 51,-99 149 i
1 REACTIVITY CONTROL SYSTEMS SURVEILLANCE REQUIREMENTS (C.ntinued)
When in MODES 3 or 4, at least once per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> by con-e.
sideration of at least the following factors:
1.
Reactor coolant system boron concentration, 2.
CEA position, 3.
Reactor coolant system average temperature, 4
Fuel burnup based on gross thermal energy generation, 5.
Xenon concentration, and 6.
Samarium concentration.
4.1.1.1. 2 The overall core reactivity balance shall be compared to predicted values to demonstrate agreement within + 1.0% ak/k at least once per 31 Effective Full Power Days (EFPD).
ThTs comparison shall consider at least those factors stated in Specification 4.1.1.1.1.e.
above.
The predicted reactivity values shall be adjusted (normalized) to correspond to the actual core conditions prior to exceeding a fuel burnup of 60 Effective Full Power Days after each fuel loading.
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t ARKANSAS - UNIT 2 3/41-2 l
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