Development of ANSI N43_9 - Dicharyx

Report
INTERNATIONAL ATOMIC ENERGY AGENCY
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
VIENNA INTERNATIONAL CENTRE
Vienna, Austria - 23 - 27 June 2014
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
Presented By R. D. (Donny) Dicharry, President
Source Production & Equipment Company, Inc. (SPEC) St. Rose, Louisiana USA
QUALITY ASSURANCE
Specify quality assurance program requirements for entities that engage in the
design, manufacture, testing or repair of industrial gamma radiography
equipment and source changers
REVISE QUALIFICATION REQUIREMENTS
Revise qualification requirements for associated equipment
CLEAR, OBJECTIVE TERMS
Use clear, objective terms that will facilitate
compliance.
PRIMARY OBJECTIVES
REFERENCE
The ISO 3999 was used as a reference document during the revision; initially
ISO-3999-1-2000 and then ISO-3999-2004 later in the process. The
subcommittee sought to harmonize with ISO-3999 as much as practical.
APPROVAL
The Working Group consisted of equal representation from
manufacturers, users and regulators.
NUCLEAR REGULATORY COMMISSION
The NRC has indicated their intention to incorporate
this edition into regulation.
SCOPE
DRAFT
ANSI N432-1980
ISO-3999-2004
This International Standard
specifies the performance,
design and test requirements
of apparatus for gamma
radiography with portable,
mobile and fixed exposure
containers of the various
categories defined in Clause 4.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
The standard includes the
qualification requirements
for those who engage in the
design, fabrication,
assembly, testing, repair or
modification of industrial
gamma radiography
equipment or source
changers.
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
DEFINITIONS
DRAFT
ANSI N432-1980
ISO-3999-2004
Gamma Radiography System.
apparatus for industrial
gamma radiography
apparatus including an
exposure container, a
source assembly, and as
applicable, a remote
control, a projection
sheath, an exposure
head, and accessories
designed to enable
radiation emitted by a
sealed radioactive source
to be used for industrial
radiography purposes
All components necessary
to make radiographic
exposures, including the
exposure device, source
assembly, control, and
other components
associated with
positioning the source
such as source guide
tubes, exposure head, and
collimators, if used.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
Industrial Gamma
Radiography System:
All integral components
necessary to perform
industrial radiography,
including the exposure
device, source
assembly, and as
applicable, associated
equipment.
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
DEFINITIONS
DRAFT
ANSI N432-1980
ISO-3999-2004
The activity of the source
shall be determined by
measuring its output at 1 m
and expressing its activity in
curies (becquerels) derived
from the following values:
ANSI N43.9
Output Activity: The
exposure rate of the
sealed source divided by
the gamma constant
(See table below).
OUTPUT ACTIVITY
Radionuclide
Gamma Constant
OUTPUT ACTIVITY
Radionuclide
Gamma Constant
Iridium-192
0.48 R/h-Ci @ 1 m
0.93 aA/kg-Bq @ 1 m
Iridium-192
0.48 R/h/Ci @ 1 m 130 Sv/h/GBq @ 1 m
Cobalt-60
1.30 R/h-Ci @ 1 m 2.52 aA/kg-Bq @ 1 m
Cesium-137
0.32 R/h/Ci @ 1 m
Cesium-137
0.32 R/h-Ci @ 1 m 0.62 aA/kg-Bq @ 1 m
Cobalt-60
1.30 R/h/Ci @ 1 m 351 Sv/h/GBq @ 1 m
Radium-226
0.20 R/h-Ci @ 1 m 1.60 aA/kg-Bq @ 1 m
Selenium-75
0.20 R/h/Ci @ 1 m
86 Sv/h/GBq @ 1 m
54 Sv/h/GBq @ 1 m
Ytterbium-175 0.125 R/h/Ci @ 1 m 34 Sv/h/GBq @ 1 m
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
DEVICE CLASS & CATEGORY
DRAFT
ANSI N432-1980
ISO-3999-2004
ANSI N43.9
Category X:
Category X:
Apparatus for gamma
radiography designed for
special applications where
the unique nature of the
special application precludes
full compliance with this
International Standard, for
example: self propelled intratubular gamma radiography
apparatus (pipe-line crawler);
gamma radiography
apparatus for underwater
use. The exposure container
shall comply with this
International Standard to the
maximum extent possible.
Equipment for industrial
gamma radiography designed
for special applications where
the unique nature of the
special application precludes
full compliance with
ANSI/HPS N43.9, for example,
self-propelled industrial
gamma radiography
equipment (pipe-line
crawlers). The industrial
gamma radiography
equipment shall comply with
this standard to the maximum
extent possible.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
GENERAL DESIGN REQUIREMENTS
DRAFT
ANSI N432-1980
ISO-3999-2004
Exposure devices shall be
designed with due regard
for the conditions which
may be encountered
during use.
Apparatus for industrial
gamma radiography shall
be designed for the
conditions likely to be
encountered in use.
(Corrosion, water, mud,
sand, or other foreign
matter.)
NOTE If feasible, a test for
continued operation
under environmental
conditions of moisture,
mud, sand and other
foreign materials, will be
developed and will be
issued as an addendum.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
Radiography equipment
shall be designed for the
conditions likely to be
encountered in use when
the equipment is used and
maintained in accordance
with the manufacturer’s
instructions. The design of
the equipment shall
minimize the effect of the
environmental conditions
of moisture, sand, mud,
and other foreign matter
that the equipment is
likely to encounter during
use.
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
GENERAL DESIGN REQUIREMENTS
DRAFT
ANSI N432-1980
ANSI N43.9
ISO-3999-2004
Wherever depleted
uranium is used for
shielding…. the source
tunnel through the
depleted uranium shall….
limit abrasion, corrosion
and consequential
deformation.
Inspection and
maintenance
For Category II exposure
devices that contain a
depleted uranium shield
the instructions shall
include an inspection of
the exposure device
source path for wearthrough to the shield in
accordance with Appendix
A.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
GENERAL DESIGN REQUIREMENTS
DRAFT
ANSI N432-1980
ISO-3999-2004
Limitation of abrasion
shall be demonstrated by
satisfactory performance
of a test consisting of the
examination of the
simulated source
assembly, to demonstrate
that there is no abrasion
of the source tunnel
which could lead to
contamination by
depleted uranium.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
Use a swab to wipe the
interior surface of the
exposure device source path
(S-Tube) Test the first swab
for DU contamination. If the
wipe test indicates DU
contamination an inspection
(e.g., visual inspection, eddy
current, etc.) of the interior
of the exposure device source
path shall be performed. If
the inspection indicates that
the exposure device source
path (S-Tube) is worn through
to the DU shield the exposure
device shall be removed from
service.
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
TESTS
DRAFT
ANSI N432-1980
ISO-3999-2004
Vibration-resistance test
The purpose of the test is
to determine the natural
frequencies which are
characteristic of the
exposure container and
to study the change in
these natural frequencies
in order to determine if
the exposure container
is able to withstand
vibrations experienced
during transportation.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
ACCOMPANYING DOCUMENTS
DRAFT
ANSI N432-1980
ISO-3999-2004
ANSI N43.9
Certificates of the
manufacturer
With each apparatus, the
manufacturer shall
provide a certificate of
conformity to show
compliance with this
International Standard
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
ACCOMPANYING DOCUMENTS
DRAFT
ANSI N432-1980
ISO-3999-2004
Inspection, maintenance
and repair procedures
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
Inspection and
maintenance procedures
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
QUALITY ASSURANCE PROGRAM
DRAFT
ANSI N432-1980
ISO-3999-2004
A quality-assurance
programme, such as that
specified in ISO 9000, ISO
9001 or ISO 9004 or the
IAEA regulations STI-PUB
998 for the design,
manufacture, testing,
transport, inspection
and documentation of
all apparatus for industrial
gamma radiography, shall
be established.
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
ANSI N43.9
Those who engage in the
design, fabrication,
assembly, testing, repair
or modification of
radiography equipment or
source changers shall
operate under the control
of a quality assurance
(QA) program. The QA
program shall include the
requirements of 10 CFR
Part 71 Subpart H, ISO
9001 or similar elements.
Compliance with the QA
program shall be certified
by an independent entity.
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
“There is no safety in engineering.
Safety if not in things, but in the way we
deal with them; safety is either in the
operator it is nowhere.”
Dr. G.J.S.Wilde
Professor Emeritus of Psychology
Queen's University Kingston, Ontario, Canada
[email protected]
Target Risk <riskhomeostasis.org>
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004
WORKS CITED:
American National Standard N432; Radiological Safety for the Design and Construction of Apparatus for Gamma
Radiography. New York: American National Standards Institute, Approve August 15, Issued January 1981.
International Standard ISO 3999:2004(E); Radiation protection – Apparatus for industrial gamma radiography –
Specifications for performance, design and test. Geneva, Switzerland. Second edition 2004-12-15.
Questions?
TECHNICAL MEETING ON
RADIATION SAFETY IN INDUSTRIAL RADIOGRAPHY
HIGHLIGHTS OF DRAFT ANSI N43.9
COMPARISONS WITH ANSI N432-1980 AND ISO-3999-2004

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