ML051670551
| ML051670551 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 06/10/2005 |
| From: | Sean Peters NRC/NRR/DLPM/LPD2 |
| To: | Jamil D Duke Energy Corp |
| Peters, S, NRR/DLPM/301-415-1842 | |
| References | |
| TAC MC3630, TAC MC3631 | |
| Download: ML051670551 (2) | |
Text
Containment Isolation Valves 3.6.3 SURVEILLANCE REQUIREMENTS (continued)
SURVEILLANCE FREQUENCY 4.
-A-------------- NOTE----a Valves and blind flanges in high radiation areas may be verified by use of administrative means.
Verify each containment isolation manual valve and blind flange that is located inside containment or annulus and not locked, sealed, or otherwise secured and required to be closed during accident conditions is closed, except for containment isolation valves that are open under administrative controls.
Prior to entering MODE 4 from MODE 5 if not performed within the previous 92 days SR 3.6.3.5 Verify the isolation time of automatic power operated In accordance with containment isolation valve is within limits.
the Inservice Testing Program SR 3.6.3.6 Perform leakage rate testing for Containment Purge In accordance with System, Hydrogen Purge System, and Containment Air the Containment Release and Addition System valves with resilient seals.
Leakage Rate Testing Program SR 3.6.3.7 Verify each automatic containment isolation valve that is 18 months not locked, sealed or otherwise secured in position, actuates to the isolation position on an actual or simulated actuation signal.
(continued)
Catawba Units I and 2 3.6.3-6 Amendment Nos. 225/220
Containment Isolation Valves B 3.6.3 BASES SURVEILLANCE REQUIREMENTS (continued)
SR 3.6.3.5 Verifying that the isolation time of each automatic power operated containment isolation valve is within limits is required to demonstrate OPERABILITY. The isolation time test ensures the valve will isolate in a time period less than or equal to that assumed in the safety analyses.
The isolation time is specified in the UFSAR and the Frequency of this SR is in accordance with the Inservice Testing Program.
SR 3.6.3.6 For the Containment Purge System valves with resilient seals, additional leakage rate testing beyond the test requirements of 10 CFR 50, Appendix J, Option B is required to ensure OPERABILITY. The measured leakage rate for the containment purge valves must be < 0.05 La when pressurized to Pa. Operating experience has demonstrated that this type of seal has the potential to degrade in a shorter time period than other seal types. Based on this observation and the importance of maintaining this penetration leak tight (due to the direct path between containment and the environment), these valves will not be placed on the maximum extended test interval. Therefore, these valves will be tested in accordance with Regulatory Guide 1.163, which allows a maximum test interval of 30 months.
The Containment Air Release and Addition System and the Hydrogen Purge System valves have a demonstrated history of acceptable leakage.
The measured leakage rate for containment air release and addition valves must be < 0.01 La when pressurized to Pa. The measured leakage rate for hydrogen purge valves must be < 0.05 La when pressurized to P..
These valves will be tested in accordance with Regulatory Guide 1.163, which allows a maximum test interval of 30 months.
SR 3.6.3.7 Automatic containment isolation valves close on a containment isolation signal to prevent leakage of radioactive material from containment following a DBA. This SR ensures that each automatic containment isolation valve will actuate to its isolation position on a containment Catawba Units 1 and 2 B 3.6.3-13 Revision No. 2