ML19354D935
| ML19354D935 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 01/17/1990 |
| From: | NRC |
| To: | |
| Shared Package | |
| ML19354D936 | List: |
| References | |
| NUDOCS 9001250037 | |
| Download: ML19354D935 (2) | |
Text
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3/4.9 REFUELING OPERATIONS
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BORON CONCENTRATION LIMITING CONDITION FOR OPERATION 3.9.1-The boron concentration of all filled portions of the Reactor Coolant System and the refueling canal shall be maintained uniform and sufficient to
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ensure that the more restrictive of the following reactivity conditions is met:
Either a K@ allowance for uncertainties, or of 0.95 or less, which includes a 1% ak/k a.
conservati b.
A boron concentration of > 1800 ppm, which includes a 50 ppm conservative allowance for uncertainties, i
APPLICABILITY: t10DE 6.
l ACTION:
With the requirements of the above specification not satisfied, immediately l
suspend all operations involving CORE ALTERATIONS or positive reactivity changes and initiate and continue boration at > 10 gpm of 8750 ppm boric acid solution or its equivalent until K,7f is reduced to < 0.95 or the boron concentration is restored to > 1800 ppm, whichever is the more restrictive.
The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.9.1.1 The more restrictive of the above two reactivity conditions shall be determined prior to:
i a.
Removing or unbolting the reactor vessel head, and.
b.
Withdrawal of any safety or regulating rod in excess of 3 feet from its fully inserted position within the reactor pressure vessel.
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4.9.1.2 The boron concentration of the reactor pressure vessel and the refueling canal shall be determined by chemical analysis at least once each 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
i 9001250037 900117
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ADOCK0500g6 PDR DAVIS-BESSE, UNIT 1 3/4 9-1 Amendment No. 143
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REFUELING OPERATIONS INSTRUMENTATION LIMITING CONDITION FOR OPERATION 1.
3.9.2 As a minisaum, two source range neutron flux monitors shall be operating, each with continuous visual indication in the control room-and one with audible indication in the containment and control room.
APPLICABILITY: MODE 6.
i ACTION:
With the requirements.of the above specification not satisfied, immediately suspend all operations involving CORE ALTERATIONS or positive reactivity changes. The provisions of Specification 3.0.3 are not applicable.
SURVEILLANCE REQUIREMENTS 4.9.2 Each source range neutron flux monitor shall be demonstrated-OPERABLE by performance of:
A CHANNEL FUNCTIONAL TEST at least once per 7 days, and a.
b.
A CHANNEL FUNCTIONAL TEST within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> prior to the initial start of CORE ALTERATIONS, and 2
A CHANNEL CHECK at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> during CORE ALTERATIONS.
c.
4 DAVIS-BESSE, UNIT 1 3/4 9-2 l
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