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| DOE-HDBK-1100-2004
Table 4.10. What-If Analysis of Cooling Water Chlorination System
LINE/VESSEL: Cooling Water Chlorination System
December 22, 1992
__ of __
DATE:
PAGE:
SCEN-
COMMENTS
WHAT IF
CONSEQUENCES
SAFETY LEVELS
ARIO
... the system is involved in a
High pressure in chlorine cylinder,
Ignition source control.
1
Verify that area is free from
fire?
fusible plugs melt, chlorine release
unnecessary fuel.
into fire ...
... the wrong material is received Water contaminated, not sterilized
None.
2
Prevention: supplier's procedures.
in the cylinder and hooked up?
- Oil
... the cylinder's fusible plugs
Chlorine release.
None.
3
Purchase and train personnel in
the use of a Cl2 cylinder leak
prematurely fail?
capping kit.
... the pressure check valve fails
Built-in relief valve opens, releasing None.
4
open (both pass chlorine gas)?
chlorine to atmosphere.
... the basin corrodes through?
Chlorinated water release.
Periodic inspection.
5
6a
None.
Eventually low chlorine in water,
... the recirculation pump fails
biological growth.
OR power is lost?
6b
Pressure check valve.
Release of undissolved chlorine to
atmosphere if pressure check valve
fails.
None.
7
Eventually low chlorine in water,
... the chlorine cylinder is run
biological growth.
dry and not replaced?
40
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