PART 3
EXECUTION
3.1
INSTALLATION
**************************************************************************
NOTE: NCRP Reports 49, and 51 or 102 will be
included for medical facilities. NCRP Report 35
will be included for dental clinics. For facilities
with both medical and dental x-ray construction,
NCRP Reports 35, 49 and 51 or 102 will be included.
This Section is applicable only to the design of
medical and dental facilities; other type facilities
are required to meet different radiation protection
standards, and must be coordinated with NAVSEASYSCOM
Detachment, Radiological Affairs Support Office,
Yorktown, VA 23691-5098 for Navy projects.
**************************************************************************
Installation of materials shall be performed in accordance with drawings
and approved manufacturer's recommendations and [NCRP Rpt 35] [NCRP Rpt 49]
[NCRP Rpt 102] [or] [NCRP Rpt 51].
3.1.1
Workmanship
Sheet lead shall be installed free of waves, lumps, and wrinkles and with a
minimum of joints. Joints in sheet lead shall provide protection
equivalent to the protection provided by the adjacent sheet lead. Joints
shall be finished smooth and neat.
3.1.2
Protection
Lead shields shall be used to maintain continuity of protection where
unshielded built-in items penetrate lead linings. Where outlet boxes,
junction boxes, ducts, conduits, and similar items prevent the use of
shields, lead sleeves or lead lining shall be used. Fasteners shall not
disrupt the continuity of shielding.
3.2
LEAD-LINING FOR CONCRETE FLOORS
**************************************************************************
NOTE: In rooms scheduled for sheet lead ceiling,
the sheet lead lining shall be placed on top of the
floor slab above the room protected, unless a
suspended lead ceiling is required. Vertical wall
shieldings shall be erected on lead strips prior to
the installation of floor linings in the shielded
room. Lead strips shall project approximately 75 mm
(3 inches) into the shielded room area. Lead lining
at the door sill opening shall be not less than 600
mm (2 feet) wider than the opening and shall extend
not less then 300 mm (1 foot) beyond the door jamb
openings.
**************************************************************************
Surfaces of concrete floors receiving lead linings shall be clean, dry, and
free of sharp projections that will damage or penetrate the sheet lead.
When necessary, a smooth screed coat of concrete shall be applied over
rough concrete surfaces. A coat of asphalt or latex paint shall be applied
to the concrete surfaces prior to installation of the sheet lead.
SECTION 13090
Page 13
Previous Page
