ML19320C539
| ML19320C539 | |
| Person / Time | |
|---|---|
| Issue date: | 06/25/1980 |
| From: | Pappas H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Wright G ILLINOIS, STATE OF |
| References | |
| NUDOCS 8007170343 | |
| Download: ML19320C539 (4) | |
Text
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CENTRAL HLEh UNITED STATES g
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NUCLEAR REGULATORY COMMISSION n
REGION til t
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O GLEN ELLYN, ILLINOIS S0137 gun 2 5 G60 o
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' Department of Public Health ATTN:
Mr. Gary N. Wright, Chief Division of Nuclear Safety 535 West Jefferson Street Springfield, IL 62761 Gentlemen:
The enclosed IE Circular No. 80-14 titled " Radioactive Contamination of Plant Demineralized Water System and Resultant Internal Contamination of Personnel" was sent to the following licensees for information on June 24, 1980:
PWR's and BWR"s American Electric Power Service Corporation Indiana and Michigan Power Company D. C. Cook 1, 2 (50-315, 50-316)
Cincinnati Gas & Electric Company Zimmer (50-358)
Cleveland Electric Illuminating Company Perry 1, 2 (50-440, 50-441)
Commonwealth Edison Company Braidwood 1, 2 (50-456, 50-457)
Byron 1, 2 (50-454, 50-455)
Dresden 1, 2, 3 (50-10, 50-237, 50-249)
La Salle 1, 2 (50-373, 50-374)
Quad-Cities 1, 2 (50-254, 50-265)
Zion 1, 2 (50-295, 50-304)
Consumers Power Company Big Rock Point (50-155)
Midland 1, 2 (50-329, 50-330)
Palisades (50-255) 8W7170 3 4 3
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c State of Illinois
- Dairyland Power Cooperative
^
LACBWR (50-409)
_b Detroit Edison Company I
Fermi 2 (50-341) f
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Illinois Power Company Clinton 1, 2 (50-461, 50-462)
Iowa Electric Light & Power Company Duane Arnold (50-331)
Northern Indiana Public Service Company Bailly (50-367)
Northern States Power Company Monticello (50-263)
Prairie Island 1, 2 (50-282, 50-306)
Public Service of Indiana Marble Hill 1, 2 (50-546, 50-547)
Toledo Edison Company Davis-Besse 1 (50-346)
Union Electric Company Callaway 1, 2 (50-483, 50-486)
Wisconsin Electric Power Company Point Beach 1, 2 (50-266, 50-301)
Wisconsin Public Service Corporation Kewaunee (50-305)
Research Reactors Curators of the University of Missouri (50-123)
Dow Chemical Company (50-264)
I i
1 l
l
-o State of Illinois Iowa State University
^
(50-116)
_I Michigan State University I
2 (50-294)
E Ohio State University (50-150)
Purdue University (50-182) o University of Illinois (50-151, 50-356)
University of Michigan (50-002)
University of Missouri (50-186)
University of Wisconsin (50-156)
Westinghouse Nuclear Training Reactor (50-087)
Fuel Facilities Allied Chemical Corporation (40-3392)
Battelle Columbus Laboratories (70-08)
Combustion Engineering, Inc.
(70-36)
General Electric Company (70-1308, 70-1309, 70-1220)
Goodyear Aerospace Corporation (70-01489) r
State of Illinois Kerr-McGee Nuclear Corporation (70-925, 70-1193)
-E Purdue University I
2 (70-152)
Sincerely, 1
Helen Pappas, Chief Administrative Branch
Enclosure:
IE Circular No. 80-14 cc w/ encl:
Mr. D. W. Kane, Sargent & Lundy Central Files Reproduction Unit NRC 20b Local PDR NSIC TIC RIII
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6)25/80 1
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SSINS.: 6830 UNITED STATES Accession No.:
NUCLEAR REGULATORY COMMISSION 8005050074 0FFICE OF INSPECTION AND ENFORCEMENT m-0 3
WASHINGTON, D. C.
20555 on x5 June 24, 1980 N
IE Circulir No. 80-14 ADI0 ACTIVE CONTAMINATION OF PLANT DEMINERALIZED WATER SYSTEM AND RESULTANT INTERNAL CONTAMINATION OF PERSONNEL This circular describes an event which occurred at a nuclear power facility; however, the generic implications may be applicable to research reactors, and fuel cycle facilities.
On March 17, 1980, a licensee informed the NRC resident inspector that portions of the plant demineralized water (DW) system were found to be radioactively contaminated.
A temporary hose used to add demineralized water to the spent fuel pool was the pathway for the cross-contamination.
After this fuel pool makeup was completed on March 14, the temporary DW line (still connected to the DW header) was inadvertently left submerged in the fuel pool.
Since the DW header pressure at the point of supply was relatively low (a DW booster pump had been secured), a siphoning action occurred, resulting in radioactive contamination of portions of the DW header.
On March 17, 1980, while performing routine secondary system chemical analyses, thelicenseediscoveredthatthedemineralizedwatertapin_ghechemistrylab contained high levels of boron and had activity of 1.5 x 10 uCi/ml (mainly Cs-134, Cs-137, Co-58, Co-60 and Mn-54).
It was subsequently discovered that demineralized water from the chemistry laboratory supply tap had been used to make five (5) pots of coffee.
The remaining coffee was confiscated and the twenty-three (23) individuals who had consumed this coffee were whole-body counted.
All involved individuals showed no intake greater than an equivalent 0.01 MPC-HRS. Analysis performed by the licensee's radiation consultant, based on the maximum concentration of radioactivity found in the coffee, indicated that the resultant 50 year dose commitment to an individual drinking eight ounces of this coffee would be less than 1 millirem.
Further licensee investigation revealed that the non-radiological chemistry DW supply tap was the only DW supply point outside the Auxiliary Building controlled area.
This DW supply tap was tagged prohibiting human consumption to prevent a similar event in the future.
It is recommended that you review your facilities use of demineralized water (DW) via temporary connections and give attention to the following:
1.
Provisions should be made to assure that radioactive materials are not inadvertently introduced into your facility's DW system via the improper use of temporary connections.
A temporary cross connection between contaminated systems and the DW system without adequate physical controls to prevent cross-contamination should be prohibited.
IE Circular No. 80-14 June 24, 1980 S
Page 2 of 2 2.
In addition to some physical means of preventing backflow into the DW systein, appropriate administrative controls should be established to ensure that the DW supply valve is secured and temporary hosing is
_r disconnected from the DW supply header after use.
i e
3.
Use of plant-supplied DW for human consumption should be prohibited.
The potable water system should be the only authorized source of water for human consumption.
4.
Examine potable and demineralized water systems to determine if pathways exist allowing or having the potential to allow contamination of these systems including temporary connections whereby siphons could cause situations described above.
No written response to this Circular is required.
Your review of this matter to determine its applicability to your facility and-sny corrective and preven-tive actions taken or planned, as appropriate, will be reviewed during a subsequent NRC inspection.
If you desire additional information regarding this matter, contact the Director. f the appropriate NRC Regional Office.
IE Circular No. 80-14 Enclosure June 24, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subject Date of Issued: to No.
Issue 80-13 Grid Strap Damage in 5/18/80 All holders of Reactor Westinghouse Fuel Assemblies OLs and cps 80-12 Valve-Shaf t-To-Actuator Key 5/14/80 All holders of Reactor May Fall Out of Place When OLs and cps Mounted Below Horizontal Axis 80-11 Emergancy Diesel Generator 5/13/80 All holders of a power Lube Oil Cooler Failures reactor OL or CP 80-10 Failure to Maintain 4/29/80 All holders of Reactor Environmental Qualification OLs and cps of Equipment 80-09 Problems With Plant Internal 4/28/80 All holders of a power Communications Systems reactor OL or CP 80-08 BWR Technical Specification 4/18/80 All General Electric Inconsistency - RPS Response BWR's holding a power Time reactor OL 80-07 Problems with HPCI Turbine 4/3/80 All holders of a power Oil System reactor OL or CP 80-06 Control and Accountability 4/14/80 Medical licensees in Systems for Implant Therapy Categories G and G1 Sources 80-05 Emergency Diesel-Generator 4/1/80 All holders of a power Lubricating 011 Addition and reactor OL or CP Onsite Supply 80-04 Securing of Threaded Locking 3/14/80 All holders of a power Devices on Safety-Related reactor OL or CP Equipment 80-03 Protection from Toxic Gas 3/6/80 All holders of a f
Hazards power reactor OL
)
80-02 Nuclear Power Plant Staff 2/1/80 All ho1ders of Reactor Work Hours Ols, including research and test reactors, and cps
.