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 NAVSEA OP 5 VOLUME 1 FIFTH REVISION
b. Three inches minimum height for lettering on signs in
operating building areas including, but not limited to, inert prepara-
tion rooms, assembly rooms, melt-pour and cooling areas, finishing
rooms, and paint spray rooms.
C. Personnel limits do not need to be posted in storage
magazines, magazine areas, transfer points, and pier and wharf areas.
7-6.3. HAZARD ASSESSMENT. Assessment of risks shall be performed on
all new or modified industrial operations and facilities that involve
ammunition and explosives. Based on this assessment, engineering
design criteria shall be developed for selecting equipment, shielding,
engineering controls, and protective clothing for personnel appropriate
for the facility or operation. The assessment should include the
following factors:
Initiation sensitivity.
a.
Quantity of materials.
b.
C.
Heat output.
d.
Rate of burning.
Potential ignition and initiation sources.
e.
f.
Protection capabilities of shields, various types of
clothing, and fire protection systems.
g. Personnel exposure with special consideration given to
respiratory and circulatory damage due to inhalation of hot vapors and
toxicological effects due to inhalation of combustion products.
7-6.4. PROTECTION MEASURES. Protective measures shall be taken to
protect personnel where explosion hazards exist.
7-6.4.1. Protection Requirements.
a.
Personnel shall be provided with protection from potential
blast overpressures, hazardous fragments, and thermal effects
including respiratory and circulatory hazards, if hazard assessments
performed in compliance with paragraph 7-6.3 indicate that the
probability of an accidental explosion producing overpressures,
hazardous fragments, or accidental flash fires and thermal hazards is
above the acceptable risk level determined on a case-by-case basis by
NAVSEASYSCOX (SEA-665).
b. When an acceptable risk level is exceeded, the protection
afforded all personnel must be capable of limiting incident blast
overpressure to 2.3 psi, fragments to energies of less than 58 ft lb,
and thermal fluxes to 0.3 calories per square centimeter Per second.
These protection levels shall be verified through analysis for cases
where personnel are at distances less than K24 or for situations where
personnel exposure criteria are obviously l exceeded. Shields complying
with MIL-STD-398 are acceptable protection.
7-28
Attachment
22E
4 of 4
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