ML20245D251
| ML20245D251 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 06/12/1989 |
| From: | FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML20245D246 | List: |
| References | |
| NUDOCS 8906270029 | |
| Download: ML20245D251 (2) | |
Text
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CONTAINMENT SYSTEMS HYDROGEN PURGE SYSTEM LIMITING CONDITION FOR OPERATION 3.6.4.3 Hydrogen purge valve pairs LRV-70/71, and 72/73 shall be OPERABLE and may be opened for up to 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> during a calendar year provided no more than one pair is open at one time.
APPLICABILITY: MODES 1, 2, 3 and 4.
ACTION:
With more than one pair of hydrogen purge valves open, or one or a.
more pairs of hydrogen purge valves open for more than 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> during a calendar year, close the open valve (s) or isolate the penetration (s) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />, otherwise 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 in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br />.
b.
With one or more hyarogen purge valves inoperable, comply with the ACTION of LCO 3.6.3.1.
SURVEILLANCE REQUIREMENTS 4.6.4.3.1 The cumulative time that each pair of 6" hydrogen purge valves LRV-70/71 ar,d 72/73 have been open during a calendar year shall be determined at least once per 7 days.
4.6.4.3.2 LRV-70, 71, 72 and 73 shall be tested in accordance with 10CFR50, Appendix J or approved exemptions.
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CRYSTAL RIVER UNIl 3 3/4 6-25 Amendment No.
8906270009 890612 PDR ADOCK 05000302 P
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o CONTAINMENT SYSTEMS BASES 3/4.6.3 CONTAINMENT ISOLATION VALVES The OPERABILITY of the containment isolation valves ensures that the containment atmosphere will be isolated from the outside environment in the event of a release of radioactive material to the containment atmosphere or pressurization of the containment.
Containment isolation within the required time limits ensures that the release of radioactive materials to the environment will be consistent with the asramptions used in the analyses -
for a LOCA, Containment Isolation Valves and their required isolation times are addressed in.the FSAR. The opening of a closed inoperable containment isolation valve on an intermittent basis during plant operation is permitted under administrative control. Operating procedures. identify those valves which may be opened under administrative control as well as the safety precautions which must be taken when opening valves under such controls.
3/4.6.4 COMBUSTIBLE GAS CONTROLS The OPERABILITY of. the equipment and systems required for the detection.
and control of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration within containment - below its-flammable limit during post-LOCA conditions.- The purge system is capable l
I of controlling the expected hydrogen. generation associated, with 1) zirconium-water reactions, 2) radiolytic decomposition. of water and 3) corrosion of metals within containment.
These hydrogen control systems are consistent with the recommendations of Regulatory Guide 1.7, " Control of Combustible Gas Concentrations in Containment Following a LOCA,"
March 1971.
In edditicr. to tis two inplace hydrogen monitors, there are two portable hydrogen analyzing units..
In the event that one hydrogen monitor is inoperable, one of the portable units may be used to monitor the hydrogen concentration in the Reactor Building.
The use of the hydrogen purge lines during operations is restricted to the 6-inch valve pairs LRV-70/71 and 72/73 since, these valves are capable of closing during a LOCA or steam line break accident.
Therefore, the SITE BOUNDARY dose guideline values of 10 CFR Part 100 would not be exceeded-in the event of an accident during containment purging operation. Operation will be limited to 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br /> during a calendar year. Only one valve pair may be opened at a time. The total time the hydrogen purge valves may be i
open during MODES 1, 2, 3, and 4 in a calendar year is. a function of anticipated need and operating experience.
Only safety-related reasons; e.g., containment pressure control or the reduction of airborne radioactivity to facilitate personnel access for surveillance and maintenance activities, should be used to support additional time requests.
Only safety-related reasee: 2.Guld ise used to justify the opening of these hydrogen prse valves during MODES 1, 2, 3, and 4 in ' any calendar year regardless of the allowable hours.
CRYSTAL RIVER - UNIT 3 8 3/4 6-4 Amendment No.
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