RADIATION PROTECTION PROGRAM: 2001 REVIEW

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2001 Radiation Protection Program Review


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RADIATION PROTECTION PROGRAM: 2001 REVIEW


Environmental Health and Safety Department

Texas A&M University




Texas A&M University holds several state and federal licenses and state
registrations which authorize the use of byproduct radioactive materials,

source materials,
special nuclear materials, and radiation producing devices. In accordance with state and
federal regulations (25 TAC §289.202 (e) (3) and 10 CFR 20.1101(c), respectively) this
report reviews the content and implementation of the radiati
on protection program for the
calendar year 2001.



This report includes review of activities conducted under the following licenses
and registrations:


License No.

Issuing Agency

Description

L00448

Texas Department of Health,
Bureau of Radiation Control

Radioactive Materials License,
TAMU and remote sites

R00304

Texas Department of Health,
Bureau of Radiation Control

Certificate of Registration,
TAMU, TAMU
-
Riverside
Campus, TAES
-
Beeville, Prairie
View A&M

R14497

Texas Department of Health,
Bureau of Rad
iation Control

Certificate of Registration,
JOIDES (D/V SEDCO/BP
-
471
aka JOIDES Resolution)

R14498

Texas Department of Health,
Bureau of Radiation Control

Certificate of Registration, Texas
Forest Service
-
Lufkin

42
-
09082
-
09

United States Nuclear Regulat
ory
Commission

Materials License, Use aboard
JOIDES (SEDCO/BP 471), R/V
Gyre, and any other TAMU
research ship


SNM
-
1518

United States Nuclear Regulatory
Commission

Materials License, SNM, TAMU

R
-
23

United States Nuclear Regulatory
Commission

License fo
r AGN
-
201reactor,
TAMU


2001 Radiation Protection Program Review


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2001 RPP Review


Review of External Dosimetry Data


Applicable to Licenses L00448, SNM
-
1518 & R
-
23 and Registrations R00304 & R14497



This review covers all components and locations of the Texas A&M University
dosimetry program f
or all Registrations and state and federal Licenses. Currently the
University has about 224 individuals with a Permit to use radioactive material and about
52 individuals with a Permit to use radiation
-
producing devices. Some of these
individuals will ha
ve authorization to work under both a License and a Registration.
Most Permits will have multiple authorized users.



The specific time covered for the dosimetry review is the last quarter of 2000 and
the first three
-
quarters of 2001. The fourth
-
quarte
r exposures records for 2001 have not
all been received from the dosimetry vendor, Landauer.


Many radioactive material users are not issued dosimetry. This is based on the
“not likely to exceed 10% of any annual limit” rule. This provision is justified
by a
through knowledge of laboratory uses of radioactive materials and many years of data,
when all users of radioactive material wore dosimetry. In order to maintain current
justification for limiting the use of dosimetry, EHSD selects individuals and la
boratories
for verification monitoring. For this review, the results of thirty
-
five individuals who
were monitored during the 4
th

quarter of 2000 and thirty
-
two individuals from the 3
rd

quarter of 2001 were audited. For both groups the highest exposed pe
rson received 17
mrem during the quarter. Most of those monitored received “minimal” exposure.
Landauer now records doses as low as 1 mrem but does not record zero mrem. For
numerical purposes assume “minimal” equals zero mrem. For this group the mean a
nd
median doses were about 1 mrem.



Almost all exposures for routinely monitored individuals are in the minimal to 10
mrem range for the reporting period (mostly quarterly). The highest levels noted are in the
veterinary medicine field in the nuclear med
icine and in fluoroscopy. The highest single
individual exposed was a nuclear medicine technician with DDE, LDE and SDE values of
422, 421 and 407 mrem respectively. This represents the first three
-
quarters of 2001 and
remains (even when extrapolated to
the full year) well below any exposure limit. The
single highest extremity exposure to an individual for any quarterly period was a clinical
radiology technician performing fluoroscopy who received 1460 mrem. This exposure is
still only a fraction of the

50,000 mrem limit (again, even when extrapolated over four
quarters).



The AGN
-
201 reactor (License No. R
-
23) was shutdown for instrumentation
upgrades in 2000 and was not operated in 2001. The Reactor Supervisor

accumulated a
DD
E of “Minimal” through the 4th quarter.


2001 Radiation Protection Program Review


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Certain special nuclear materials possessed by TAMU under License No. SNM
-
1518 are now authorized under BRC License L00448. These sources were not used in a
manner that could result in any individual receiving a

dose, which exceeds 10% of any
annual dose limit. The only large sources are two Plutonium
-
239/Beryllium sealed
neutron sources. The first is a 1
-
curie source (license R
-
23) that provides a neutron
background for the AGN 201 reactor. The other is a 2
-
cu
rie source (license L00448) that
is used as a check source for AGN reactor periodic checks as well as for other
experiments requiring a neutron flux. The maximum year
-
to
-
date dose equivalents
(through 12/31/01) received by any member of the EHSD staff from

all sources and
activities (including those authorized under SNM
-
1518 and L00448) were 240 millirem
(DDE, LDE, and SDE,wb). Both neutron sources are located in a restricted access area
within the Nuclear Engineering Department.



EHSD maintains an aggres
sive ALARA program to further limit exposure. As an
example, an EHSD health physicist has discussed the issue of exposure reduction with a
clinical technician and will be visiting the technician during clinical operations in order to
determine how further

to reduce exposure.


The RSO or a designee reviews all exposure records when they arrive. Higher
than expected exposures are investigated and all exposures that approach or exceed a
limit are investigated and brought to the attention of the Radiation Safe
ty Committee. In
addition to personnel dosimetry, a number of area badges are deployed in specific areas
--

especially for new devices or uses where a comprehensive exposure profile has not yet
been attained.






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2001 RPP Review


Review of Internal Dosim
etry Data


Applicable to License L00448 and 42
-
09082
-
09





A total of 58 routine and post
-
work thyroid bioassays were performed. Twenty
-
eight of these were specific to nuclear medicine (I
-
131), 17 were other labs (I
-
125) on
Texas A&M main campus, and 13
were TAMU
-
Beeville (I
-
125). Three were above the
minimum detectable limit (MDA): two from nuclear medicine and one from TAMU
-
Beeville. All were substantially below 10% of the annual limit. The TAMU Procedure
Manual for the Use of Radioisotopes and Radia
tion Producing Devices required none of
the bioassays that were performed. The thyroid bioassay program was re
-
evaluated in
2001 in order to help reduce paperwork generated. Starting in October of 2001, bioassays
for I
-
131 were performed only if there wa
s suspicion of an intake, or elevated levels of
contamination in the cat ward. This has reduced the number of bioassays performed in
nuclear medicine by 75%.



Two urine bioassays were performed as the result of a contamination problem in
416
-
VMR building
. One was below MDA, the other was a committed effective dose
equivalent of 7mRem. Although two waste shipments were performed in 2001, no other
urine bioassays were recorded.



2001 Radiation Protection Program Review


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2001 RPP Review


License Renewal and EHSD Policies and Procedures


Applicable

to All Licenses and Registrations



L00448

The Texas Department of Health, Bureau of Radiation Control (BRC) issues this license.
It authorizes the University to use radioactive material in College Station, TX and also at
designated remote sites. This l
icense is due to expire on September 30, 2004. In
February, Amendment No. 106 of this license was received from BRC, authorizing use of
radioactive materials at the Animal Science Teaching, Research, and Extension Center
(ASTREC) in College Station. ASTR
EC is considered a part of the main TAMU campus
because of its proximity and therefore is not charged a remote site fee. In addition, BRC
corrected a clerical error in License Condition No. 24. In late September, Amendment
No. 107 of this license was re
ceived from BRC. This amendment included: removing the
remote sites at San Angelo, El Paso, and Corpus Christi; corrected the
address/designation of Overton and Fort Stockton, and; replaced a member of the
Radiological Safety Committee. Amendment No. 107

was issued in November by the
BRC to correct typographical errors in License Condition No. 5.


42
-
09082
-
09

The U.S. Nuclear Regulatory Commission issues this license. It authorizes the University
to use selected radionuclides at temporary job sites at se
a. This license is due to expire on
November 30, 2007. No significant license activities associated with this license occurred
in 2001.


SNM
-
1518

The U.S. Nuclear Regulatory Commission issues this license. It authorizes the University
to use special nucl
ear material in College Station. This license is due to expire on June
30, 2004. In a letter dated November 19, 2001, TAMU requested that the NRC terminate
license SNM
-
1518. Prior to submitting the letter, all special nuclear materials possessed
by TAMU

under license SNM
-
1518 were transferred to license L00448 and R
-
23.
License termination was requested because TAMU has within the last 5 years greatly
reduced its inventory of special nuclear materials, to the point that they can easily be
possessed unde
r L00448 and R
-
23, so SNM
-
1518 is no longer needed.


R
-
23

The U.S. Nuclear Regulatory Commission issues this license. It authorizes the University
to operate a 5
-
watt AGN
-
201 nuclear reactor. The reactor was not operated during 2001.
This license expire
d August 27, 1997 and is in timely renewal. No significant license
activities associated with this license occurred in 2001.



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R00304

This registration is issued by the Texas Department of Health, Bureau of Radiation
Control and authorizes the University
to possess and use radiation
-
producing devices on
the College Station campus, Riverside Campus, Beeville, and Prairie View. The
expiration for this license is September 30, 2007. Significant licensing action occurred
when two electron beam accelerators,
one large X
-
ray unit, and one Van de Graaff
accelerator were added to the license by letter to the BRC dated November 2, 2001. The
electron beam accelerators and the large X
-
ray unit will be used in the new Electron
Beam Pasteurization Food Research Facil
ity. Dr. Les Braby will use the Van de Graaff
accelerator for research in the area of fruit irradiation.


R14497

This registration is issued by the Texas Department of Health, Bureau of Radiation
Control and authorizes the University to possess and use a
diffraction x
-
ray unit aboard
the D/V SEDCO/BP
-
471. This vessel is also referred to as the Joides Resolution. On
January 25, 2001 a license renewal application was submitted to the BRC for this license.
Subsequently, the license was reissued by the BRC
for an 8
-
year period, with a new
expiration date of February 28, 2009.


R14498

This registration is issued by the Texas Department of Health, Bureau of Radiation
Control and authorizes the University to possess and use a cabinet x
-
ray device in Lufkin.
On
January 25, 2001 a license renewal application was submitted to the BRC for this
license. Subsequently, the license was reissued by the BRC for an 8
-
year period, with a
new expiration date of February 28, 2009.

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2001 RPP Review


Radiation Safety Training


Applicable to All Licenses and Registrations




Radiological safety training was presented to 407 faculty, staff, and students by
EHSD in 2001. Of that total, 0 received moisture gauge training (2 hours duration), 60
received laser safety training (2 hou
rs duration), and 347 received broad
-
based training
suitable for users of unsealed radioactive sources (4 hours duration). Of the 347 that
received general radiological safety, 263 users attended a live session and 84 were trained
via TTVN.



Refresher tr
aining is in the process of development and implementation. A web
-

based training delivery module was purchased in 2001.


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2001 RPP Review


Radioactive Waste Disposal


Applicable to L00448, SNM
-
1518, and 42
-
09082
-
09





BRC
-
approved alternate disposal me
thods allowed under 25 TAC 202(ff)(1)(B),
(fff)(1), and (fff)(4) were resumed at TAMU. One disposal was conducted via the local
landfill. On April 18, 2001, 33 bags of
3
H and
14
C

waste from bin #2 (5.72 m
3
, 3.741mCi
total activity) and 206 bags of all oth
er short
-
lived isotope also from bin #2 (35.69m
3
,
2.985 mCi total activity) were disposed of in the local landfill. In addition, the following
amounts of liquid waste were discharged to sanitary sewage:


Isotope

3
H

14
C

32
P

35
S

125
I

Yearly Total (

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of dry, solid, short
-
lived waste,
and 5 m
3

of dry,

solid, long
-
lived waste.







2001 Radiation Protection Program Review


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2001 RPP Review


Inspections and Audits of the EHSD


Applicable to All Licenses and Registrations





The Bureau of Radiation Control performed a brief inspection on the TAMU
College Station campus on December 15, 2000. Th
is inspection was for BRC registration
R00304, specifically looking at human
-
use x
-
ray machines. The inspection resulted in
one Severity Level III violation due to a misalignment of the automatic collimation device
on a x
-
ray machine located at the Beutel

Health Center. A service company was
contacted and the problem was corrected on December 18, 2000. This item was not
discussed in the 2000 RPP review because the inspection report was received after the
2000 RPP review was completed.


In addition, BRC i
nspected five remote sites authorized under License L00448.
The five remote site inspections resulted in three alleged violations. The violations were
all severity level IV. All three violations were cited during the March 7, 2001 BRC
inspection of the
Corpus Christi site. TAMU responded to the BRC with explanations of
why the alleged violations were incorrect. Subsequently, BRC closed the inspection
report with no further information or explanation required from TAMU. All the
inspection reports have
been presented to and reviewed by the RSC.



In 2001, EHSD conducted seven inspections of Permitted Users at the following
remote sites: Tarleton State University
-
Stephenville, Texas A&M University
-
Galveston,
Texas A&M University System
-
Health Science Cen
ter
-
Temple, TAES
-

Alice, TAES
-
Beeville, TAES
-
Corpus Christi, TAES
-
Weslaco. All inspection findings have been
appropriately addressed. Inspection reports are shared with the Permitted Users that were
inspected and are included here by reference only. Co
pies are available from the EHSD.


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Report Submitted By:







Date
:







Radiological Safety Officer







Reviewed By:








Date:







Chair, Radiological Safety Committee