ML20012B495
| ML20012B495 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 03/02/1990 |
| From: | NORTHEAST UTILITIES |
| To: | |
| Shared Package | |
| ML20012B412 | List: |
| References | |
| NUDOCS 9003150107 | |
| Download: ML20012B495 (1) | |
Text
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.7 3/4.5 EMERGENCY CORE COOLING SYSTEMS 3/4.5.1 ACCUMULATORS LIMITING CONDITION FOR OPERATION 3.5.1 Each Reactor Coolant System (RCS) accumulator shall be OPERABLE with:
a.
The isolation valve open and power removed, b.
A contained borated water volume of between 6618 and 6847 gallons, c.
A boron concentration of between 2200 and 2600 ppm, and d.
A nitrogen cover-pressure of between 636 and 694 psia.
APPLICABILITY: MODES 1, 2, and 3*.
ACTION:
a.
With one accumulator inoperable, except as a result of a closed isolation valve, restore the inoperable accumulator to OPERABLE status within 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> or be in at least HOT STANDBY within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and reduce pressurizer pressure to less than 1000 psig within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
-b.
With one accumulator inoperable due to the isolation valve being closed, either immediately open the isolation valve or be in at least HOT STANDBY'within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> and reduce pressurizer pressure to less than 1000 psig within the following 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />.
SVRVEILLANCE RE0VIREMENTS 4.5.1.1 Each accumulator shall be demonstrated OPERABLE:
a.
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:
1)
Verifying the contained. borated water volume and nitrogen cover-pressure in the tanks to be within the above limits, and 2)
Verifying that each accumulator isolation valve is open.
b.
At least once per 31 days and within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> after each solution volume increase of greater than or equal to 1% of tank volume by verifying the boron concentration of the accumulator solution; and
- Pressurizer pressure above 1000 psig.
MILLSTONE - UNIT 3 3/4 5-1 9003150107 900302
,o PDR ADOCK 05000423 D P
PNU
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