ML19337A724
| ML19337A724 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 09/19/1980 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19337A723 | List: |
| References | |
| NUDOCS 8009290496 | |
| Download: ML19337A724 (4) | |
Text
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REACTOR COOLANT SYSTEM ISOLATED LOOP LIMITING CONDITION FOR OPERATION 3.4.1.4 The boron' concentration of an isolated loop shall be maintained ll greater than or equal to the boron concentration of the operating loops,-
unless the loop has been drained for maintenance.
APPLICABILITY:
MODES 1, 2, 3, 4 and 5.
ACTION:
With the requirements of the above specification not satisfied, do not open the isolated loop's stop valves; either increase the boron concentration of the isolated loop to within the limits within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-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 /> with the unisolated portion of the RCS borated to a SHUTDOWN MARGIN equivalent to at least 1.77% Ak/k at 200 F.
SURVEILLANCE REQUIREMENTS
- 4. 4.1.4 The boron concentration of an isolated loop shall be determined to be
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greater than or ecual to the boron concentration of the operating loops at least once per 24 ncurs and within 30 minutes prior to opening either the hot leg or cold leg stop. valves of an isolated loop.
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C: - nu - UNIT 2 3/4 4-4 September 1980 8009290 N[
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9 SURVEILLANCE REQUIREMENTS
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4.4.1.3.1 The required residual heat removal loop (s) shall be determined OPERABLE per Specification 4.0.5.
4.4.1.3.2 The required reactor coolant pump (s), if not in operation, shall be
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determined to be OPERABLE once per 7 days by verifying correct breaker alignnients and indicated power availability.
4.4.1.3.3 The required steam generator (s) shall be determined OPERABLE by verifying secondary side water level to be greater than or equal to 17% at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
4.4.1.3.4 At least one coolant loop shall be verified to be in operation and circulating reactor coolant at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.
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NORin ANNA - UNIT 2 3/a 4-3a
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REACTOR COOLANT SYSTEM ISOLATED LOOP STARTUP LIMITING CONDITION FOR OPERATION i
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- 3. 4.1. 5 A reactor coolant loop cold leg stop valve shall remain closed until:
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The isolated loop has been operating on a recirculation flow of greater than or equal to 125 gpm for at least 90 minutes and the
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temperature at the cold leg of the isolated loop is within 20*F of the highest cold leg temperature of the operating loops.
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b.
The reactor is subtritical by at least 1.77 percent Ak/k.
APPLICABILITY:
ALL MODES.
ACTION:
With the requirements of the above specification not satisfied, suspend startup of the isolated loop.
s SURVEILLANCE RE0VIREMENTS
- 4. 4.1. 5.1 The isolated loop cold leg temperature shall be determined to be 4
. within 20*F of the highest cold leg temperature of the operating loops within ll 30 minutes prior to opening the cold leg stop valve.
- 4. 4.1. 5. 2 The reactor shall be determined to be subcritical by at least 1.77 ll percent ak/k within 30 minutes prior to opening the cold leg step valve.
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NORTH ANNA - UNIT 2 3/4 4-5 September 1980 i
SAFETY VALVES - SHUTDOWN LIMITING CONDITION FOR OPERATION 3 4.2 A minimum of one pressurizer code safety valve shall be OPERABLE with a lift setting of 2485 PSIG 1%.*
APPLICABILITY:
MODES 4 and 5.
ACTION:
With no pressurizer code safety valve OPERABLE, immediately suspend all opera-tions involving positive reactivity changes and place an OPERABLE RHR loop into operation.
s SURVEILLANCE RE0VIREMENTS 4.4.2 No additional Surveillance Requirements other than those required by Specification 4.0.5.
"ine lift setting pressure shall correspond to ambient conditions of ne salve at' nominal operating temperature and pressure.
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