ML20070B504

Form NEL-006, Procedure for Changing Filters in Water Demineralizer Circuit

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: ML20070B456 ML20070B488 ML20070B496 ML20070B498 ML20070B501 ML20070B504 ML20070B509 ML20070B516 ML20070B519 ML20070B521 ML20070B523 ML20070B527 ML20070B530 ML20070B534
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. ,

9. Replace new filter i Admit as little air as(25 micron possible prefilter,125 by filling the jar with micron water,post filter).

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

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