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 NRRO
INST 9080.1
January 1986
NRRO INSTRUCTION 9080.1
From:
Commanding Officer, NRRO
To:
Hyperbaric Facility Manager
Subj:
Man-Rated Hyperbaric Facility Reentry Control
Procedure
Ref:
(a) SS521-AA-MAN-010, U.S. Navy Diving and Manned
Hyperbaric Systems Safety Certification Manual
(b) Approved Hyperbaric Facility Cleaning Procedure
(c) ASME Chapter VIII, Division II
Encl:
(1) REC Procedure Sequence
(2) REC Sheet
(3) REC Log (sample page)
1. Purpose. To promulgate the procedures to be utilized for
controlling reentry into recompression chamber systems which
require material and cleanliness control in order to accomplish
and subsequently maintain NAVFAC system certification.
2. Discussion.
a. Reference (a) provides guidance requiring that reentry
control
procedures be established for recompression chamber
systems. This instruction is issued to supplement specified
requirements of reference (a).
b. The term "Certified System" with regard to this instruction
is inclusive of all pressure hull fittings, including penetrators,
hatches, and viewports within each pressure hull and each breathing
gas or other piping system within the total system as defined by
the Scope of Certification.
c. Material control for replacement of repair parts in a
"Certified System " is regulated by the material schedule contained
in the "as-built" drawings and by the requirements of reference
(a).
d. Hydrostatic or gas tightness testing pressures shall be in
accordance with the "as-built" drawings and the guidelines of
reference (c).
C-3
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