ML20148B345
| ML20148B345 | |
| Person / Time | |
|---|---|
| Issue date: | 03/17/1988 |
| From: | Liza Cunningham Office of Nuclear Reactor Regulation |
| To: | Stohr J Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8803210481 | |
| Download: ML20148B345 (16) | |
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION g
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MAR 171968 i
MEMORANDUM FOR:
J. Philip Stohr, Acting Director Division of Radiation Protection and Emergency Preparedness I
Office of Nuclear Reactor Regulation FROM:
LeMoine J. Cunningham, Chief Radiation Protection Branch Division of Radiation Protection and Emergency Preparedness Office of Nuclear Reactor Regulation
SUBJECT:
SUMMARY
OF A MEETING ON THE NEED FOR REVISED REGULATORY GUIDANCE ON HOT PARTICLE EXPOSURES OF SKIN In a response to a request from the Nuclear Management and Resources Council (NUMARC) NRC staff met with representatives of NUMARC and other industry groups on March 10, 1988. The purpose of the meeting was for the NRC staff to hear industry concerns regarding adverse impacts of the current regulatory position regarding exposure of skin to hot ) articles and the need for a revised regulatory position, in interim guidance, t1at would be less restrictive.
Industry groups represented at the meeting in addition to NUMARC were the Edison Electric Institute (EEI)
Institute for Nuclear Power Operations (INPO) and several nuclear utilities.
Senior NRC staff members present at the recting were T. T. Martin, NRR, and B. M. Morris, RES. A list of attendees is enclosed.
l Industry representatives expressed a concern that, as a result of the current regulatory position, a high level of attention and emphasis is currently being given to hot particles and hot particle doses at nuclear power plants. This attention and emphasis is causing unnecessary taar and concern among nuclear power plant workers and is creating a potentist for unjustified litigation.
Other concerns are rolti-million dollar costs and additional worker radiation exposures, inconsistent with ALARA principles, that could be substantially reduced by a change in the NRC position on the hot particle exposures.
Indus-try representatives emphasized that a change in the NRC position would not result in any decrease in protection of workers or the general public nor in the controls that have been established to prevent het particles from being transported offsite. Copies of the viewgraphs used in the industry presenta-tion are enclosed.
NRC representatives indicated that this issue is being considered by the staff, which is now gathering infometion on the issue.
The staff requested addi-i tional infomation on the estimates of costs and other impacts presented by
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ER 171988 J. Philip Stohr 4 industry representatives. Mr. Tipton, NUPARC, promised to provide the request-ed infomation to Mr. Martin, NRR. Mr. Tipton also will provice a copy of NUMARC coments on the draft NCRP reconnendations on hot particle exposure limits when these coments are available, j
Original signed by LeMoi.nc J. Cunn.ngham LePoine J. Cunnincham, Chief Radiation ProtectYon Branch Division of Radiation Protection j
and Emergency Preparedness Office of Nuclear Reactor Regulation
Enclosures:
1.
Attendees - NRC/NUMARC/EEI Meeting 2.
Viewgraphs used in industry presentation Distribution:
JP5tchr,~TtH LJCunningham, NRR JEWigginton, NRR ODLynch, NRR JDBuchanan, NRR DEMatthews, NRR RJBarrett, NRR JHSniezek, NRR TTMartin, NRR REAlexander, RES EMMorris, RES JWNHickey, hMSS GLSjoblom,NMSS RRBt11amy, RI i
DMCollirs RII l
WDShafer, R111 LAY.Tndeli, RIV FAninslawski,RV i
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i ENCLOSURE 1
(
i ATTENDEES - NRC/NUMARC/ eel MEETING
(
March 10. 1988 i
f NAME ORGANIZATION l
T. T. Martin NRC/NRR Ton Tipton NLHARC Lynne Fairobent NUMARC i
Dick Warnock NUMARC/So. Calif. Ed.
E. Scott Medling NUMARC/So Calif. Ed.
Lionel Lewis Duke Power Co.
Dave Harward NUMARC Mike Williams Union Electric Co.
Eugene Rollins S. C. Elec. A Gas R. E. Alexander NRC/RES Bill Morris NRC/RES Ed Flack NRC/0E Al Roecklein NRC/RES Oliver D. T. Lynch NRC/NRR 4
John D. Buchanan hRC/NRR James D. Jamison Battelle - PNL Alan Nelson NUMARC Kenneth Travis EE!
Bill Kindley INPO L. J. Cunninghan NRC/NRR 4
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ENCLOSURE 2 HOT PARTICLES t
o MICROSCOPIC ----------------------------- < 100 pH I
o PARTICULATE ----------------------------- INSOLUBLE o
HIGHLY CHARGED f
o SIGNIFICANT ACTIVITY (SEVERAL pCI)
FUEL / FISSION FRAGMENTS (Cs, CE, Ru)
(FAI!.ED FUEL) e ACTIVATION PRODUCTS (Co, CR, MN, ZR, HF, IA, SB)
(MACHINING OPERATIONS AND WEAR) 1 o
HOT PARTICLES ARE NOT NEW i
l 0
RECENT DISCOVERY DUE TO MORE SENSITIVE MONITORING EQUIPMENT o
APPR0XIMATELY 75% OF PLANTS HAVE IDENTIFIED H0T PARTICLES
t EXIEEI_0F HOT PARTICLES IN INDUSTRY BASED ON AN EPRI SURVEY OF 61 PLANTS:
18 PLANTS -- FUEL PARTICLE INCIDENT ONLY*
42 PLANTS -- INCIDENCE OF ACTIVATION PARTICLES
- 17 PLANTS -- NO INCIDENTS OF PARTICLES f
SOME PLANTS HAD BOTH TYPES 1
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t 4
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SUMMARY
INDUSTRY CONCERNS i
1 i
1.
ALARA CONSIDERATIONS 2.
DOSE ASSIGNMENT AND EVALUATION i
3.
REGULATORY COMPLIANCE 4.
IMPACT ON WORKERS l
5.
IMPACT ON RADWASTE VOLUME-6.
CREDIBILITY 1
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ALARA CONSIDERATIONS
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UNNECESSARY WHOLE BODY DOSE INCURRED o
o MISDIRECTED RESOURCES o
RISK PERSPECTIVE o
REDUCED EFFICIENCY
l DOSE ASSIGNMENT AND EVALUATION i
o METHOD OF DOSE ASSIGNMENT o
APPROPRIATE DOSE LIMIT o
IMPLIED RISK 8
REGULATORY COMPLIANCE o
TECHNICAL "0VEREXP05URES" o
ENFORCEMENT o
LOWER SALP RATINGS o
IMPACT ON INSPECTION FREQUENCY l
0 ANI PREMIUMS 1
1 we ww ww,---,,--
IMPACT ON WORKERS o
PHYSICAL IMPACT o
PSYCHOLOGICAL IMPACT o
IMPROPER RISK PERCEPTION
IMPACT ON RADWASTE VOLUME o
PROTECTIVE CLOTHING o
SOLID WASTE o
LIQUID WASTE 4
I I
i I
l t
l CREDIBILITY o
EXPOSURE RECORDS o
EXPOSURE LIMITS o
HEALTH PHYSICS PROGRAMS o
UTILITY AND INDUSTRY PUBLIC IMAGE WORKERS I
PUBLIC l
0 HRC IMAGE WORKERS PUBLIC
IMPLEMENTATION OF INTERMIN GUIDANCE ASSUME:
As pCI-HRS ALTERNATIVE 1:-
SIMILAR APPROACH TO CURRENT USE OF MPC-HRS.
o IF es > LIMIT INDICATES A PROGRAMMATIC REVIEW MAY BE NECESSARY REGULATORY ACTION MEDICAL FOLLOW-UP (TIME PERIOD BASED ON M0IST DESQUAMATION) o As < LIMIT INDUSTRY ADMINISTRATIVE LIMITS AND CONTROLS o
RECORDS RECORD pCI-HRS. EXPOSURE IN SAME MANNER AS MPC-HRS.
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IMPLEMENT EXPOSURE CONTROLS BASED ON pCI-hrs CONCEPT.
FOR EXAMPLE:
MPC-hrs ACTION
,uCI-HR
< 2 MPC-hrs NOT REQUIRED
< 5% As TO BE RECORDED 2-40 MPC-hrs RECORD EXPOSURE 5%<As<100%
> 40 MPC-hrs INVESTIGATE, TAKE
>100% As CORRECTIVE ACTION l
RECORD EXPOSURE 1
l REGULATORY ACTION 1-
> 520 MPC-hrs
. ESCALATED ENFORCEMENT ULCERATION ACTION NOTE:
An=pCI-HR LIMIT AD0PTED l
s
ALTERNATE 2:
CONVERT As To DOSE o
DETERMINE ABSORBED DOSE TO 0.1 CM2 (og) o RELATE TO RISK 2,000 RAD AVERAGED OVER 0.1 CM2 AT SKIN DEPTH OF 100 pM RISK = 1 x 10-6 1 REM TO SKIN OF WHOLE BODY RISK = 1 x 10-6 BASED ON EQUIVALENT RISKS 2,000 RAD = 1 REM o
Da = (As) 1 REM h
= REM 2,000 RAD o
ASSIGN AS HOT PARTICLES SKIN DOSE IN RECORDS o
Da > EXISTING LIMIT (7.5 REM /QTR)
REGULATORY ACTION MEDICAL FOLLOWUP (PROPER TIME PERIOD) o ULCERATION ESCALATED ENFORCEMENT ACTION
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