ML20070B504
| ML20070B504 | |
| Person / Time | |
|---|---|
| Site: | University of Utah |
| Issue date: | 05/25/1988 |
| From: | UTAH, UNIV. OF, SALT LAKE CITY, UT |
| To: | |
| Shared Package | |
| ML20070B459 | List: |
| References | |
| NEL-006, NEL-6, NUDOCS 9101310201 | |
| Download: ML20070B504 (1) | |
Text
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Fcrm NEL 006 Rsc Approvat: Ms48 1
Procedure for Changing Filters in the Water Domineralizer Circuit 1.
Change prefilter when flow drops below 2 gpm with pump throttled.
2.
Change postfilter if flow does not increase to 3 gpm after changing prefilter.
3.
Turn off pump.
4.
Close pre-lon and fill valve and pre-lon valve.
5.
Have bucket available to catch spill.
6.
Check filters and domineralizer with gamma survey meter. Survey domineralizer-6" from top of tank. Treat filters as contaminated radioactive waste until determined otherwise.
Pre filter mR/hr Post filter mR/hr Demineralizer mR/hr
'7.
Loosen plastic jar with strap wrench.
8.
Remove plastic jar and place in bucket to dry.
Replace new filter i
9.
Admit as little air as(25 micron prefilter,125 micron post filter).
possible by filling the jar with water, f,..
- 10. Screw jar and filter back on handtight.
11, Turn on pump open pre lon and fill valve open pre lon valve. Check for leaks.
' 12. Check and record flow rate, gpm
- 13. After filter has dried, count filter on the Nai detector. Are any visible
- Gamma ray peaks present in spectrum?
YES NO~
Give source and ap:>roximate activi if YES:
- pCl If activity is greater chan pCl, treat filters as radioactive raste.
14 Operator performing procedure.
- 15. Date completed.
Form approved by Reactor Safety Committee:
' Reactor Administrator:[db
/
Date: May 25.1988
- an23A888A 8888 h o
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