ML19262A429
| ML19262A429 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 11/17/1976 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML19262A419 | List: |
| References | |
| NUDOCS 7910290524 | |
| Download: ML19262A429 (3) | |
Text
.
f HRC STAFF GUIDELIt!ES FOR EXCLUDI!!G EXERCISIl!G (CYCLluG) TESTS OF CERTAIM VALVES DURIUG PLANT GPEP.ATION Any valve which when exercised (cycled) could put the plant in an unsafe condition should not be tested.
Below are some examples of the types of valves that shculd be specifically excluded from exercising (cycling) tests during plant operation":
1.
All valves whose failure in a non-conservative position during the cycling test would cause a loss of system function should not be exercised.
Valves in this category would typically include all non-redundant valves in lines such as a single discharge line from the refueling water storage tank, or accumulator discharge lines in PNR's and the liPCI turbine steam supply and the HPCI pump discharge in BNR's.
Other valves may fall into this For category under certain system c3nfigurations or plant operating acdes.
example, wnca one train of a redandant system such as ECCS is inoperacle, non-redundant valves in the remaiaing train should not be cycled since their
, failure would cause a loss of tctal system function.
2.
All valves, whose failure to close'during a cycling test would result.in a loss of containment integrity.
Valves in this category would typically include all valves in containment penetrations where the redundant valve is open and inoperable.
All valves, which when cycled,'could bubject a system to pressures in excess 3.
of their design pressures.
It is assuned for the purpose of a cycling test, that one or more of the upstream check valves has failed unless positive methods are available for determining the pressure or lack thereof on the high pressure side of the valve to be cycled.
Valves in this category would typically include the isolation valves of the residual heat renoval/
shutdown cooling system and, in some cases certain ECCS valves.
- All AS!!E Section XI Category A and B valves should be cycled, as practicable, at each cold shutdown, but need not be cycled more often than once every 3 months.
gg10290 N 1484 160.
. d., For Valve Testing;. identify:
1) each valve in ASME Section XI Categories A & B that will be exercised every 3 months during normal plant operation (indicate whether partial or full stroke exercise).
ii) each valve in ASME Section XI Category A that will be leak tested during refueling outages.
.iii) all valves in ASME Section XI Categories C, D, and E, that will be tested, the type of test and the test frequency.
For check valves, identify those that will be exercised every 3 months and u-those.that will only be exercised during cold shutdown.
'issi -
\\
1484 161
, APPENDIX 9 INFORMATION REOUIRED FOR !!RC REVIEW 0F RE0 VESTS FOR RELIEF FROM ASME C00E SECT 101 XI REGUIREFEllTS DETERMit:ED TO BE IFP?ACTICAL 1.
Identify component for which relief is requested:
a.
Name and number as given in FSAR b.
Function c.
ASME Section III Code Class d.
For valve testing, also specify the ASME Section XI valve category as defined in IWV-2000.
2.
Specifically identify the ASME Code requirement that has been determined to be impractical for component.
3.
Provide information to support the determination that the requirement in (2) is impractical; i.e., state and explain the basis for requesting relief.
4.
Specify the inservice inspection (or testing) that will be performed in lieu of the ASME Code Section XI requirements that have been determined to be impractical.
5.
Provide the schedule for implementation of the procedure (s) in (4) above.
.\\
1484
!A2
.