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NUCLEAR REGULATORY COMMISSION yW*
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JIM 0 71988 Cm A.
t MEMORANDUM FOR: Bill M. Morris Director Division of. Regulatory Applications Office of Nuclear Regulatory Research m
FROM:
Frank J. Congel, Director
' Division of Radiation Protection 4
and Emergency Preparedness Office of Nuclear Reactor Regulation l.
SUBJECT:
RESPONSE TO STAFF REQUIREMENTS. MEMORANDUM OF MARCH 30, 1988 As requested in your May 17, 1988 memorandum on this subject, we are l
providing the enclosed response to item number 4, concerning applications of:
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the residual surface contamination criteria of Regulatory Guide 1.86, as'it applies to nuclear reactor facilities. This infonnation was provided by~
Peter B. Erickson, NRR/PDSNP.
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Frank J. Congel.. Director Division of Radiation Protection and Emergency' Preparedness Office of-Nuclear Re&ctor Regulation
Enclosure:
Response to item,4, Staff.
Requirements. Memo 3/10/88 L
4-CONTACT:
John D. Buchanan. NRR AYM Y/0711093 6 YA' z
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ENCLOSURE
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" Acceptable ~1evels of' residual surface contamination are designed (sic) in Regulatory-Guide 1.86.
Facilities with surface contamination levels below 4
those specified may be ~ released for unrestricted use..How many and what-types of licensee facilities have been decommissioned using these.
criteria?"
-Response:
The " Acceptable levels of residual surface containinetion' i
of Regulatory. Guide 1.86 have been used since June ~of 1974 for releases of reactor facilities to unrestricted access-following decommissioning. The same set of numbers was-used in the decommissioning of reactors prior to issuance of Regulatory Guide 1.86 and since at least 1970. At that i
7' time these numbers were specified in a draf t position from the Division of Materials Licensing dated April-22,1970
=(Attachment 1).. Since April of 1970 we have terminated-reactor licenses for 31 non-oower reactors (including l.
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critical facilities) under tie above surface contamination L
criteria.
Since 1981 we have added a requirement for specific gamma t
emitting radionuclides (Co-60. Eu-152 and.Cs-137) that are not surface contamination. These radionuclides must be l'
removed such that the radiation level from them is less than 5 microroentgens per. hour above natural background as measured at one meter.from the surface.. Alternatively, since 1982 a licensee is permitted to demonstrate that-
. reasonable occupancy of an area would be such that the
-potential exposure from these ganna-emitting radionuclides l.
would be less than 10 mrem per year. Examples of~these criteria are provided in Attachment 2.
L shows the status, as of March 8, 1988, of reactors-(including critical facilities) that have been shutdown with continued license or decommissioned.
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