IR 015000004/1999001
| ML20202G572 | |
| Person / Time | |
|---|---|
| Site: | 015000004 |
| Issue date: | 01/26/1999 |
| From: | Bhalla N, Henderson P NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | |
| Shared Package | |
| ML20202G564 | List: |
| References | |
| 15000004-99-01, 15000004-99-1, NUDOCS 9902050219 | |
| Download: ML20202G572 (5) | |
Text
.
_. _
.
.._
_.. _ _
. _. -. _. _ _.. _.. _ _ _ -. _. _ _ _. _ _. _. _ _. _
.
I-
'
!
i
'
!
.
.
.
.
'
U.S. NUCLEAR REGULATORY COMMISSION
REGION I
I INSPECTION REPORT
.
,
Report No.
150-00004/99-001 j
. 7< -
Docket Nov 150-00004
,
- CA Ucense No.
CA-2641-19
'
Licensee:
' Alpha-Omega Services, Inc.
-i X
l Address:
9156 Rose Street Bellflower, Ca 90706
- -
Location inspected:
Wyoming Valley Health Care System 345 North Pennsylvania Avenue
' Wilkes Barre, Pennsylvania Inspection Date:
January 6,1999
I l
Inspector:
A
I~
~
-
Neelam Bhalla date Health Physicist
' Approved By:
/Thf lovi b
/ 87 k9
i'aInela Herfderpon', Acjing Ch sf
' date'
.i Nuclear Materials Safety Branch 2 Division of Nu' clear Materials Safety
.
.
Document Name: B:\\DNMS Documents \\lnsp Report \\RcA-2641 19.99-001.wpd
!
U'
'
9902050219 990126 ISE6lO55 !
PDR STPRO ESOCA e
PNt
,
.-
_
-
._
-
.
. -. _ _-
_. -..
-
. _ _ _.
. _ - - _
-
.
)
-
EXECUTIVE SUMMARY Alpha-Omega Services, Inc.
NRC Inspection Report No.150-00004/99-001 An announced inspection was conducted to examine the activities of the licensee under the general license provisions of 10 CFR 150.20 at wyoming Valley Health Care System's facilities located at 345 North Pennsylvania Avenue, Wilkes Barre, Pennsylvania. The inspection was conducted while the licensee installed Cobalt-60 (co-60) sources in an Elekta Instruments Leksell Gamma Knife Stereotactic Radiosurgical Unit.
There were 201 sources with an average activity of 30.75 Curies (Ci) per source, that were installed in the Gamma Knife unit with each source designated to be loaded in a particular cell location of the unit. The installation was performed by using a loading unit that provided two glove boxes, mechanical arms and viewing windows to provide radiologicc: safety to the loading personnel.
Within the scope of this inspection, no violations of the NRC requirements were identified.
ii Inspection Report No. 150-00004/99-001 B:\\DNMs Documents \\lnsp Report \\RCA-2641-19.99-001.wpd
-.. _
- _
..
.
.-_
- - -
-.
. _. _
.
.
REPORT DETAILS 1. Background Information The licensee is authorized to install co 60 sources in an Elekta Instruments Leksell Gamma Knife Radiosurgery unit. The shipping papers indicated that on December 29, 1998, G.E. Nuclear Energy shipped 201 Model 43047 co-60 sources, average activity of 30.75 Ci per source (6181Cl total activity), to WVHCS to be installed into an Elekta Instruments Leksell Model 23004 Gamma Knife unit. WVHCS performed the package receipt radiation surveys and wipe test measurements on January 5,1999. WVHCS is authorized to receive the sources under an NRC License, No. 37-16170-02 for use in an Elekta Instruments Leksell Gamma Knife Unit.
11. Radiation Protection a.
Insoection Scope The inspector observed the licensee's procedures for minimizing the workers radiation exposure.
b.
Observations and Findinas The inspector noted that the cobalt-60 sources were loaded using Alpha-Omega's loading machine, LAM 33. In addition, lead bricks were stacked around the loading unit to further minimize the radiation levels. Personnel exposures were minimized by using the mechanical arms, the glove boxes and the viewing windows for source manipulation.
The inspector observed that the licensee personnel wore appropriate dosimetry, including self-reading pocket dosimeters. The inspector noted that the licensee used calibrated survey meters. The survey meters included two RDS-120 micro-R meters and a Victoreen model 813 area survey meter. The inspector noted that the radiation levels ranged from 95 to 120 micro Roentgen per hour (uR/hr) and maximum levels of 1.5 milli Roentgen per hour (mR/hr) was measured when the sources were placed into the treatment unit. The inspector noted that all 201 sources were uniquely identified by an engraved identification number and each source was planned to be loaded in a certain cell location of the treatment unit. The inspector noted that two individuals were manipulating and identifying the sources at the loaaing unit and one individual was moving the treatment unit to ascertain that the correct source is loaded into each corresponding cell of the treatment unit.
The accumulated whole body exposure for personnel as recorded by the self-reading pocket dosimeters, ranged from 3mR to 6mR.
c.
Conclusions The licensee used protective devices and followed procedures to minimize radiation exposure to personnel while loading co-60 sources.
Inspection Report No. 150-00004/99-001 B:\\DNMs Documents \\lnsp Report \\RCA-2641 19.99-001.wpd
. _.
.
_-
.. _
.
.
_._
.
.
Ill. Record Keeping Requirements a.
Insoection Scope The inspector reviewed the documents kept by the licensee to show compliance with the l
general license in 10 CFR 150.20.
,
b.
Observations and Findinas
,
The inspector examined the License, shipping papers, the bill of lading and Emergency
,
,
Procedures.
c.
Conclusions i
The required documents were available at the temporary job site. No safety concerns l
were identified.
i
)
IV. Leak Test and Removable Contamination Surveys a.
jnsoection Scope j
WVHCS performed a leak test on the cask that contained the sources in accordance with its package opening procedures. The licensee performed leak tests of the sources after the sources were loaded in the Gamma Knife unit. The licensee also performed a contamination wipe test on the loading tools, after completion of the source installation process. The inspector reviewed the leak test and contamination wipe test results.
b.
Observations and Findinas The inspector noted that the WVHCS facility RSO performed a wipe test on the shipping cask that contained co-60 sources and determined that the removable contamination was less than 2200 disintegrations per minute (DPM) for 100 square centimeter area.
The licensee performed leak test on the sources after the sources were loaded and also performed a contamination wipe test of all the tools that were used. The test results indicated that all sources and loading tools had contamination of less than 0.005 microcuries ( Ci).
c.
Conclusions The removable contamination of the shipping cask was less than 2200 DPM/100 l
square centimeter. The leakage contamination on the loading tools and the loaded sources was less than 0.005gCl. No safety concerns were identified.
V. Exit Meeting
'
Inspection findings were discussed with the licensee Alternate Radiation Safety Officer, at the conclusion of the inspection.
o
Inspection Report No.150-00004/99-001 B:\\DNMs Documents \\lnsp Report \\RCA-2641 19.99-001.wpd
!
-,
-
.
.
.
-
. -... _..
.
..
.
.
.
.
..
....
-
,-,
.
I PARTIAL LIST OF PERSONS CONTACTED Licensee Cary Hedger, Alternate RSO J
Martin Knotts '
Elekta Instruments. Inc.
,
.
.
i Tommy Strandh
'
Jim Mounts Wyomina Vallev Health Care System -
Cindy Turchin, RSO.
i i
Inspection Report No. 150-00004/99-001 B:\\DNMS Documents \\insp ReporfRCA-2641 19.99-001.wpd
.
er m