ML20126A334

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Requirements Re Accessible Air Gap for Generally Licensed Devices,10CFR31 & 32, Providing Addl Regulatory Control Over Devices W/Both Accessible Air Gap & Radiation Levels Exceeding Specified Values
ML20126A334
Person / Time
Issue date: 11/20/1992
From: Chilk S
NRC OFFICE OF THE SECRETARY (SECY)
To:
References
FRN-57FR56287, RULE-PR-31, RULE-PR-32 NUDOCS 9212210008
Download: ML20126A334 (23)


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(M FRS42fr7) %is90013 7f y y d _ '92 "0V 20 P 3 :59 NUCLEAR REGULATORY COMMISSION 2/O 10 CFR Parts 31 and 32 ,

i RIN 3150-A082 Requirements Concerning the Accessible Air Gap -

for Generally Licensed Devices AGEflCY : Nuclear Regulatory Commission.

ACTION: Proposed rule.

SUMMARY

The Nuclear Regulatory Commission (flRC) is proposing to amend its regulations governing the safe use of radioactive byproduct material in certainmeaiuring, gauging,andcontrollingdevices. The proposed rule would _

provide for additional regulatory control over devices with both an accessible air gap and radiation levels that exceed specified values. This action is intended to make it increasingly difficult for personnel to obtain access to the gauge's radiation beam, thereby reducing the frequency and likelihood of ,

, unnecessary exposure to plant personnel. This amendment applies both to persons who distribute these special measuring, gauging, and controlling devices under the NRC general license provisions and to persons who use the devices under the NRC's general license.

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shelv OATES: The comment period expires [120 days following put:lication in the Federal Register). Comments received af ter this date will be considered if it is practicable to do so, but assurance of consideration cannot be given except for comments received on or before this date.

ADDRESSES: Mail written comments to: The Secretary, U. S. Nuclear Regulatory )

Commission, Washington, DC 20555, Attention: Docketing and Service Branch. 1 Deliver comments to: One White Flint North,11555 Re kville Pike, Rockville, i

'MD, between 7:30 am and 4:15 pm on weekdays. Copies of the draft regulatory-analysis, as well as copies of the comments received on the proposed rule, may be examined at the NRC Public Document Room, 2120 L Street NW. (Lower Level), l

)

Washington, DC.

FOR FURTHER INFORMATION CONTACT: Donald Hopkins, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC- 20555, telephone-(301) 492-3784.

SUPPLEMENTARY INFORMATION:

Background

On February 12, 1959 (24 FR 1089), the predecessor _to the Nuclear Regulatory tommission (The Atomic Energy Commission) amended its regulations to establish a general license for_the-use of radioactive byproduct ma' al contained in certain luminous, measuring, gauging, _ and controlling devices.

The general license permitted the use of specially- approved devices, designed' 2

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for safe use-by persons not trained in radiation' safety, for' the purpose of:

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detecting, measuring, gauging, or controlling thickness,- density, level, interface location,- radiation, leakage, or chemical composition, or for' producing light or an ionized atmosphere. Those permitted to use these devices in the conduct of their business under the general license included-(1) commercial and industrial firms; (2) research, educational, and medical institutions; -(3) individuals; and (4) Federal, State, or local government-agencies. This simplified the licensing process so that a case-by-casa ,

detern.ination of the adequacy of the liceasea's training, experience, and radiation safety program by the regulatory authority was unnecessary.

The practice of using a device under a general license grew over the years. There are currently some 450,000 devices in use by about 35,000 general licensees in non-Agreement _ States where the NRC licenses and otherwise controis the use of these devices. In Agreement States, where State re s latory agencies-control the use of the devices, there are about twice this.

number of generally licensed devices. In 1989, there.were 54 vendors of.

generally licensed devices -licensed by the NRC, - There. were 76 vendors '

licensed by Agreement States. The regulatory framework and process have changed little over the past three decades.

Studies conducted by the'NRC in 1984,1985, and 1986' revealed several areas of safety concern about the use of some sealed source devices under.

general license. Investigators- observed that accountability for some devices was inadequate and that-users wereLfrequently unaware of regulations which applied to them. Furthermore, some devices could not be located and final-H

-disposition of some devices could not be determined-by the user or the NRC.

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A-follow-up survey of a sample of-general licensees possessing gauging _

devices, laooratory analytic devices, and -tritium-activated exit lights'  !

cor.taining radioactive byproduct material was completed in 1990. The survey was designed to obtain information about the respondents' knowledge of the regulatery requirements for general licensees, and their practices and procedures concerning maintenance, testing, and disposition of the generally licensed devices. Although a high prcportion of the general licensees, particularly gauge licensEcs, displayed knowledge of the regulatory requirements and compliance with them, the survey indicated the possible need:

for further regulatory attention in some areas, most notably the _ possession and use of tritium-activated exit lights.

Based cn the results of the earlier studies and the recent survey, the ,

NRC concluded that the general license program should be continued, but with some modification. The po sibilities considered included the following:

1. Quality assurance program for vendors;
2. Third-party testing of generally licensed devices;
3. Ultimate disposition of byproduct sources;
4. Upper bound on source size permitted _under general license; and 5 Responsibilities and communications.

From these choices, a decision was made in 1990 to proceed by rulemaking with an NRC program for corresponding by mail with general licensees.- This program of correspondence by mail is being developed to ensure that the general licensees are aware of and understand the requirements attendant _ to possession of these devices. This will be accomplished through (1). an initial verification by the NRC of the' irformation= regarding the. identification of the device and people res;onsible for the device collected at the time at which 4 1 i

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l the general licensee takes possession of -the device, and (2) periodic follow- y up by the NRC.to remind general licensees of their regulatory. responsibilities

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and to verify the currency of the information on possession and use of these 1

' devices. _This communication program will affect approximately 35,000 general i licensees who possess an estimated 450,000 devices containing byproduct material. The Notice of Proposed Rulemaking to' implement- this program'was -

published in the Federal Register on December 27, 1991 (56 FR 67011).

The rulemaking presented in this Notice of Proposed Rulemaking, viz., to place an upper bound on the radioactive source size permitted under general license in a gauge device which has an accessible air. gap between the source and detector of the device, is another action proceeding from the-results of the above studies. The action is intended to make it increasingly difficult for personnel to obtain access to the gauge's radiation beam, thereby reducing ,

the frequency and likelihood of unnecessary radiation exposure to plant personnel. The NRC estimates that there are some 3000 gauges which use a i

large enough radiation source to be a potential-problem. The gauges are in the possession of about 750 general licensees. 'This action and the program of corresponding with_ licensees provide the minimum cost-effective improvements-needed to respond to the problems identified in-_the general-license. program.

Discussion The_ gauges identified as needing improved regulatory control are.those

. which both have a -somewhat higher radiation level and have.been installed so.-

that there is a sufficiently large air gap between the-radioactive sealed source and the gauge-detector such that an untrained or careless worker could 5

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place his or her' body directly in the radiation beam. Many gauges contain a -

small enough quantity 0f radioactive material so that even with a large air gap no significant radiation exposures would result. However, for those gauges that have both a large air gap and radiation-levels _ that ex_ceed.a certain value, the NRC intends to prohibit further distribution under a

, general license and to convert existing general licenses to specific licenses.

Notwithstanding, general licensees who currently possess such gauges would have the option of having the area around those gauges physically modified to ,

eliminate -the accessible air -gap. General licensees who exercise this option would not be required to become specific licensees. The NRC estimates'that ,

the 3000 or so gauges that are the subject of this rulemaking (one-half percent of the general licensed devices) are used by approxiciately 750 general licensees- (2 percent of the total number of general licensees). The NRC_is not considering specifically licensing over 97% of the general licensees and over 99% of the devices. Further, the lower cost option to provide passive: e controls in lieu of specific !icensing, where feasible, is also provided in this proposed rule.

The size of the air gap addressed by this proposed rule is a gap of 45 cm (18 in.) or greater between the radiation source and detectors shaped in-such a way so as to allow insertion of a 3:0 cm (12 in.) diameter sphere into--

'the radiation beam without the removal of any barrier. The proposed rule would define such a gap as an " accessible air gap." The specification is _ a l

reasonable limit to restrict access of a person's ' torso. _ An air gap which is 45 cm (18 in.) or greater between the source and _ detector but_ is enclosed by-a -

wire mesh or other barrier would not be considered an " accessible air gap" under this proposed rule provided the barrier is configured so that a 30 cm

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(12 in.)-diameter sphere could not be placed in'the radiation beam without the remov'al .of- the _ barrier.

The magnitude of the radiation level of concern which would be addressed by this rule change is 125 millirem per hour or greater at _45 cm (18 in.) from _

the radiation source with any shutter in the open position. This radiation level specification is based on the scenario of a worker receiving less than 4 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> of direct radiation exposure in a calendar. quarter at a distance of 45 cm (18 in.) from the radiation source as a result of unlikely and careless practices. This would result in'a quarterly exposure of less than 125 millirem, which is one-torth the radiation exposure limit for occupationally exposed workers. This corresponds to the dose restriction for general licensees in llRC regulations (10 CFR 32.51 (a)(2)(ii)). The 45 cm (18 in.) specification corresponds to a guideline set forth for NRC inspectors-that a radiation level must extend 45 cm (18 in ) into an accessible area for-it to cause whole body radiation doses. While this guideline would allow part of an individual's body to be exposed to a higher radiation level than that specified while the body is within the 45 cm (18 in.) distance and closer to the source of the radiation, practical considerations dictate that a person-would not be situated in the radiation beam next to the radiation source for long periods of time. An exception to this " practical consideration" statement is a situation where individuals enter for cleaning, maintenance, or-any other_ reason,- a vessel on which a radioactive _ gauge has been installed. .

If it is possible that the gauge shutter could be left open, exposing the individual wno entered the tank, greater radiation exposures-could result than are thought reasonable for generally licensed operations. General licensees are not generally trained or equipped to quickly discover a radiation-problem 7

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which is causing undue radiation exposure of plant workers. That-is why_thei proposed rule in 6 31.5 (b)(2) would prohibit the use of- vessel gauges under .

4 general license.

There are some general licensees who at present possess this type'of gauge installed in such a way that unnecessary radiation exposure could occur if untrained or careless employees inadvertently placed their bodies in the gauges' radiation beams. General licensees who currently possess these gauges would be required to either obtain a specific license for the gauge and to establish a radiation safety program to restrict and control access to those gauges, or have the area around the gauges physically modified to eliminate the " accessible air gap," and hence not be required to obtain a specific license. Although this physical modification, as with all installation and servicing of the gauge, would need to be performed by a person with a specific license that authorizes him or her to perform this type of activity, the Commission views it as a lower cost alternative to obtaining a specific license.

The Commission intends to modify the Enforcement Policy, 10 CFR Part 2, Appendix C, at the time of _ the final rulemaking to address enforcement actions for failure to either obtain a specific license or to physically' modify.the devices to avoid the need to obtain a specific license. The possession-of-material without the required specific license is considered under Supplement VI of'the Enforcement Policy-to be a Severity Level III violation since it . involves possession of unauthorized material. Consequently, a civil-penalty will-be; considered for -such violation. It is the Commission's intent to provide a separate ' assessment scheme for. these violations should the

-proposed rule be finalized. It is expected that each source which is 8

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f ,1 possessed in' violation-of the, rule would be subject to a separate assessment of $600. Except for the identification factor in Section VI.B.2.(a)'of 10 CFR Part 2, Appendix' C, this penalty would be assessed without regard to the normal assessment factors in Section VI.B.2. The_ penalty would be assessed.

without normally holding an enforcement conference. The written response required by 10 CFR 2.201 and 2.205 should provide sufficient information for regulatory purposes for this type of violation. The purpose of this penalty.

process would be to deter violations by making noncompliance with this requirement more expensive than compliance.

Comments from Agreement States A draft of this proposed rulemaking was provided to the Agreement States for their review and comment. Agreement States'are those States which have entered into an agreement with the NRC or its predecessor Atomic Energy Commission to regulate persons within their States who have in their ,

possession byproduct, source, and special nuclear material. This allows NRC to discontinue exercising most regulatory control over radioactive materials used in the State. However, NRC-is required to assure that the-State. program is compatible with the NRC program and is adequate to protect the public-health and safety. The Atomic Energy Act of 1954, as amended,-authorizes -and directs the NRC to cooperate with the States'in the formulation of. standards _

tor protection against hazards of radiation to assure that State and NRC programs for protection against hazards of radiation-will be-coordinated and compatible.

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m Of the 23 Agreement States that acknowledged 'their receipt- of the draft rule for comment, 17 offered specific comments. Those comments have _all- been considered. None of the States objected to the publicationlof the proposed.

rule. Nine of the States agreed that the draft rule treated at least part of the generally-licensed device problem and should- be proposed. Five States asked what help would be available to them to identify the gauge installations which require corrective action. The NRC is prepared to share with them the information and search techniques to identify gauge installations in need of corrective action. On the issue of the period of time over which the-corrective action on the gauges would be implemented, all the Agreement States commenting urged a shorter time-period than the 3 years in the draft NRC notice. Because the time period proposed in the draft notice is based on the licensing / inspection resources available to the NRC for this project, no I changes have been made in that schedule. The NRC plans to work with the States, encouraging them to provide a'/ance notice to their licensees-of this-upcoming action, in order that the Agreement States implementation of compatible new rules restricting accessible air gaps on generally licensed devices could be completed at the same time as the NRC implementation of _its rules.

While the comments of five States supported the criteria _ for defining j

" accessible air gap" in the -draf t rule, seven States commented that -further consideration should be given to a more conservative approach in two areas.

,_ .First, it was suggested that the rule . eliminate large tanks with level gauges from the generally licensed device cateoory. The NRC agrees that-gauges on

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large tanks which are manually _ cleaned.from the inside should be specifically-licensed and has clarified that position. Second, the suggestion was made to 10

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.. extend the rule to protect body extremities,- 9tsed on its decision to effect the minimum cost-effective improvements needed to respond to the' problems identified with the general license' program, the flRC believes- this rule-change _

- should be limited to eliminating the potential for radiation exposure of major.

parts of the body, not extremities. As an example, even assuming a radiation dose rate inside an air gap of 250 mrem / hour, an individual would have to keep 1

a hand in the beam more than 20 hours2.314815e-4 days <br />0.00556 hours <br />3.306878e-5 weeks <br />7.61e-6 months <br /> per year to exceed a dose to the -

extremities of 5000 mrem per year, one-tenth the dose _ limit now imposed by l 10 CFR Part 20 for occupationally exposed individuals. Based on this consideration, the fiRC demurs with regard to extending the rule to protect body extremities.

Of the seven States submitting specific comments on _the proposed-radiation level in an accessible air gap below which no action would be required, only two States supported the 125 mrem /hr at 45 cm_(18 in.)'in the draft rule. Several States questioned the NRC's estimate that persons exposed' to radiation in an accessible air gap of a gauge would-not be so exposed for as much as I hour per calendar quarter but provided no rationale for that contrary view. Nonetheless, in the NRC's view, all- the characteristics _of. a gauge serve to limit the time a person could be exposed in an accessible air gap. During normal gauging, the material being gauged is flowing _ through the air gap, preventing the presence.there'of any individual. When not operating,.

the normal condition of the gauge is to have the source shutter: closed,

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shielding any-significant radiation from the air gap. Most generally,

-licensed gauges utilizing radioactive material are designed with a " fail-safe" 4 shutter mechanism which automatically shields most of the radiation when the-p gauge is not being operated. If the-shutter were left open (or if-there_were.

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,; l no shutter),Lwarnings from 'the operator and from the. warning labels on the-i gauge would normally deter any individual from positioning his/her body so as:

to expose it to radiation. There is little reason to believe that even an untrained worker could easily find a way to expose his/her body to significant' radiation levels (except perhaps in conducting normal maintenance inside a large tank) for any significant time.

Two States commented that the radiation level lim *ts should te N1ated to permitted exposures of members of _ the general public' on the basis that -

individuals who are untrained in radiation safety, even though occupationally exposed, should be considered members of the general public. Other States

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;uggested that the radiatica level limits should be related to the definitions of " radiation area" (5 mrem /hr at 30 cm (12 in.)), or "high radiation area"'
(100 mrem /hr at 30 cm (12 in.)), or-to other doses or dose rates _which are lower than those proposed in the draft rule on the basis of making the gauge restriction equal to one of the many existing limits in the.NRC's radiation safety standards in 10 CFR 20, Standards for Protection Against Radiation."

These suggestions relating'to consistency with Part 20 standards-were I

seriously considered by-the NRC and thought to have merit. . In the final-analysis, however, the-NRC has given greater weight to the following practical considerations in recommending that-the accessible air gap rule be proposed

, using the original criterion of 125 mrem per hr at 45 cm '(18 in.)' from the radioactive source:

, 1. Based on discussions with manufacturers-and users of these gauges, it is the NRC'.s understanding that most general licensees possess radiation

-profiles of their gauge environs,:provided to them by the gauge. installer,-

which characterizes the gauges in terms -of radiation levels produced by the j 12 J

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. t gauge at 43 cm (18 in.). In the llRC's opinion, using a criterion related to i

the way in which a gauge is characterizco is a practical means of distinguishing those gauges that should be specifically licensed from those

' hat can remain generally licensed. If we were to change the distance at I which the radiation level criterion is measured so that the relationship ,

between the radiation profile and criteria of this rule is not readily  ;

discernable to the general licensee, the radiation profile would lose its value and the general licensee would become more dependent on outside expertise in deciding whether a particular gauge falls within the criteria of this rule. ,

2. The criterion of 125 mrem per hour at 45 cm (18 in.) from th I

gauge's radiation source was c!.osen as a reasonable specification related to &

radiation uposure of 500 mrem in 1 year, and to actual gauges which have been 1

distributed under general licenses. The 11RC recognizes, however, that other ,

radiation level and other radiation exposure standards could be chosen which are also acceptable. The NRC sees no substantial improvement in changing the criterion from 125 mrem per hour at 45 cm (18 in.) to 100 mrem per hour at .

45 cm (18 in.) or to 100 mrem per hour at 30 e (12 in.) as have been suggested, although these criteria would be acceptable, On the other hand, the other suggestions of radi ' ion level criteria of 5 mrem per hour at 30 cm_

(12 in.). 2 mrem per hour, and radiation exposure criteri of 50 mrem per year are extremely low for purposes of his rulemaking. However, for the purpose of allowing Agreement States to impuse mon stringent criteria in their b juri sdictio'. should they wish to do so, the NRC support s Compatibility

. Divi 'on Il for this rule, 13

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Invitation to Comment Comments on the criteria oefining the type of gauge requiring better IRC control and the implementation of the proposed amendments are encouraged.

Comments are especially solicited on:

1. The proposed use of both the 45 cm (18 in.) dimansion and allowing '

insertion of a 30 cm (12 in.) diameter sphere into the radiation beam as criteiia for defining the maximum size of the accessible air gap;

2. The proposed use of 125 millirem per hour at 45 cm (18 in.) from the .

source as the level of radiation to which a worker could be exposed as the threshold triggering the restrictions of this proposed rule; a

3. The need for a grace period between the effective date of the final rule and the date on which particular portions of the rule become effective. ,

It is unclear how long it will take for present users of that type of gauge to i react to the restrictions and take some kind of action, either to have the devit.e physically modified to eliminate the accessible air gap, or to apply for and obtain a specific license;

4. The costs that _might result from physically modifying the areas
  • around the devices or obtaining specific-licenses; and ,
5. The specification of Compatibility Division 11- for Agreement State compatibility, which will allow States to set different, more restrictive limits for this rule when it is finalized and subsequently _._ adopted in State regulations. NRC is particularly interested in comments from manufacturers and distributors on the impacts associated with this level'of Agreement _ State compatibility, and whether this involves matters of interstate commerce.

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finding of No Significant Environmental Impact: Availability The proposed amendment, if adopted, would not result in any activity I that significantly affects the environment. The Commission has determined under the National Environmental Policy Act of 1969, as amended, and the i Commission's regulations in Subpart A of 10 CFR Part 51, that this rule is not ,

a major Federal action significantly affecting the quality of the human environment and, therefore, an environmental impact statement is not required.

The proposed amendments, if adopted by the NRC and as implemented by .

licensees, would likely result in a potential gain in radiation protection by  ;

reducing the frequency and likelihood of unnecessary radiation exposures. It is expected there would be no additional radiation exposure to individuals or the environment from any physical modification of gauges to satisfy the requirements of this proposed rule. The environmental impact assessment.

1 forming the basis for this determination is available for inspection at the NRC Public Document Room, 2120 L Street NW. (Lower Level), Washington, DC. .

Paperwork Reduction Act Statement-The proposed rule amends the information collection requirements that ,

are subject to the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.).

This proposed rule has been submitted to_the Office of-Management and Budget-for review and approval of the paperwork requirements.

The public~ reporting burden for this collection of information_ is ,

estimated to average 14 hours1.62037e-4 days <br />0.00389 hours <br />2.314815e-5 weeks <br />5.327e-6 months <br /> per response, including the time for reviewing instructions. searching existing data sources, gathering and maintaining the-15 1

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data needed, and completing and reviewing the collection of information.

Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to the Information and Records Management Branch (MNBB-7714), U.S. Nuclear-Regulatory Commission, Washington, DC 20555, and to the Desk Officer, Office of Information and Regulatory Affairs (3150-0120, 3150-0028 and 3150-0017),

NE08-3019, Office of Management and Budget, Washington, DC 20503.

Regulatory Analysis The NRC has prepared a draft regulatory analysis for this proposed ,

regulation. The analysis examines the cost and benefits of the alternatives considered by the NRC. The draft analysis is available for inspection in the NRC Public Document Room, 2120 L Street NW. (Lower Level),' Washington,' DC.

Single copies of the draft analysis may be obtained from Donald R. Hopkins, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, Washington, DC 20555, telephone: 301-492-3784.

Regulatory flexibility Certification Based on information available at this stage of the rulemaking proceeding and in accordance with the Regulatory Flexibility Act, 5 U.S.C. 605(b), the NRC certifies that, if promulgated, this-rule will not have a significant economic impact on a substantiai number of small entities.

The NRC has adopted size standards that classify a small entity as one whose gross annual receipts do not exceed $3.5 million. The proposed rule affects 16 1.. . _ _ . _ _ . - _ _ _ _ _ _ _ . _ . _ . _ _ - _ _ - . _ _ . _ . . _ . - . . . . _ _ _ . _ _ _ _ _

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about 750 persons using 3000 gauges under this general license. Many of the users would be classified as small entities, if these users were to adopt the regulatory alternative of obtaining a specific license authorizing use of-their presently held gauges, the costs, as discussed in the draft regulatory analysis, " Proposed Regulations Concerning Certain Generally Licensed Devices," would be as follows:

1. Application preparation $1200 (first year only).
2. Renewal application preparation $400 (every 5 years thereafter).
3. Licensing fee $500 (first year and every 5 years thereafter). ~ ,
4. Inspection fee $1200 (first year and every 5 years thereafter). .
5. Annual fee $1500 (every year, includes $100 surcharge).
6. Establishing radiation safety program $7500 (first year only).
7. Maintaining radiation safety orogram $2500 (every subsequent-year).

Total of $11,900 for first year; $6,100 every subsequent fif th year; and

$4,000 for all other years, for an average annual-cost over a 15-year period of $4,807. The.225 licensees who are estimated to already possess a specific license (even though using gauges under a general-license) would have'a one-time additional cost of $780 to add the generally-licensed gauges to their specific ~ license. The average cost to these licensees over a 15-year. period would be $52 per year.

While the nearly $5000 per year average costs would.be significant for-some small entities who decide to obtain a specific license,- the f1RC believes ,

that the economic impact of the proposed requirements would not be significant

.for a substantial' number of. small entities because of the alternative available other than becoming .a specific. licensee. If'a person makes the air.

gap of the gauge iinccessible by any number of means, such as- building a : -

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~ ted:P c lund the air gap, locking the area where the air gap exists, or by ,

t erlocks where no one can enter the area while the radiation source is in i f

F the exposed position, that person would not be required to obtain a specific l license. Although this alternative may be impractical in some :ases because l of the nature of the gauging process, the NRC believes it will be a practical alternative in most cases. The NRC believes that this would subject affected persons tc the one-cime additional barrier construction costs estimated at

$1700 per facility. Over the 15-year period this would average $113 per year.

The potential gain in radiation protection by reducing the frequency and likelihood of unnecessary radiation exposure significantly outweighs the economic impact on small general licensees.

However, the NRC does not have information indicating how many of the potential 525 general licensees may be prevented from adopting the less costly alternatives for technical reasons. Because of this uncertainty, the NRC is ,

seeking tomment from small entities (i.e., small businesses, small organizations, and small jurisdictions under the Regulatory Flexibility Act) as to how the regulations will affect them and how the-regulations may be tiered or otherwise modified to impose less stringent requirements on small entities while still adequately protecting the public- health and safety.

Those small entities which offer comments on how the regulations could be modified to take into account the differing needs of small entities should specifi: ally discuss the followtig:

(a) -The size of their business and how the proposed regulations would result. f a a significant economic. burden upon them as compared to larger organizations in the same business. community. Commenters should provide specific:information concerning physical barrier construction costs. ,

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- Commenters should also indicate specific reasons why the physical protection

- alternative uay not be appropriate for them.

i (b) How the proposed regulations could be modified to take into account the differing-needs or capabilities of small entities.

(c) The benefits that would accrue, or the detriments that would be avoided, if the proposed regulations were modified as suggested by the commenter. j (d) How the proposed regulations, as modified, would more closely equalize the impact of NRC regulations er create more equal access to_ the benefits of Federal programs as opposed to providing special advantages to any individuals or groups.

(e) How the proposed regulations, as modified, would still adequately prctect the public health and safety.

Backfit Analysis The NRC has deterrrined that the backfit rule,10 CFR 50.109, does not

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apply to this proposed rule, and therefore, a backfit analysis is not required for this proposed rule because these proposed amendments do not involve any f

provisions that would impose backfits as defined in 10 CFR 50.109(a)(1). '

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. _ _ _ _ _ ._. _ , . _ _ _ _ _ .._.___m,_- a..--..__.._.._._____ _ _.-

. i List of Subjects in 10 CFR Parts 31 and 32 _;

i 10 CFR Part 31 - Byproduct material, Criminal penalties, Labeling, Nuclear materials, Packaging-and containers, Radiation protection, Reporting l and recordkeeping requirements, and Scientific equipment.  ;

10 CFR Part 32 - Byproduct material, Criminal penalties, Labeling, ,

Nuclear materials, Radiation protection, Reporting and recordkeeping requirements, and Scientific equipment.

For the reasons set out in the preamble and under-the authority of the Atomic Energy Act of 1954, as amended, the Energy Reorganization Act of 1974,

~

as amended, and 5 U.S.C. 553, the NRC is proposing to adopt the following amendments to 10 CFR Parts 31 and 32:

t Part 31 - GENERAL DOMESTIC LICENSES FOR BYPRODUCT MATERIAL

1. The-authority citation for Part.31 continues to read as follows:

AUTHORITY: Secs. 81, 161, 183, 68 Stat. 935, 948, 954, asamended.(42 U.S.C. 2111, 2201, 2233); secs. 201, as amended. 202, 88 Stat. 1242, as amended, 1244 (42 U.S.C. 5841, 5842).

Section 31.6 is also issued under sec. 274,_73 Stat. 688 (42-U.S.C.

2021)..

For the purposes of sec. 223, 68 Stat._958, as amended (42 U.S.C. 2273);

il 31.5(b) and (c) (1)-(3) and (5)-(9), 31.8(c),= 31.10(b), and 31.11(b),- (c),

and (d) are issued under sec. 161b, 68-Stat. 948, as amended-(42_U.S.C.

- 2201(b); _and il 31.5(c) (4), and (5), and (8), andl31.11(b) _ and _(e)' are issued under sec. 1610, 68: Stat. 950, as amended (42 U.S.C.-2201(o));

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____...,.3__..

/  :

. j i

2. In i 31.5, paragraph (b) is revised and paragraph (e) is added to ,

read as follows: ,

6 31.5 Certain measurina. cauaina or controllina devices.

(b) The general license in paragraph (a) of this section:

(1) Applies only to byproduct material contained in devices which have been manufactured or initially transferred and labeled in accordance with the specifications contained in a specific license issued pursuant to i 32,51 of this chapter or in-accordance with the specifications contained in a specific license issued by an Agreement State which authorizes distribution of the devices to persons generally licensed by the Agreement State; (2) Applies after (3 years after the effective date of this rule) on_ly __

to byproduct material contained in a device which has been manufactured and installed (1) so that the air gap between the radiation source and detector of ,

the device is less than 45 cm-(18 in.), (2) so that the air gap of the device

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would not allow insertion of a 30 cm (12 in.) diameter sphere into the radiation beam of the device without removal of a barrier, or (3) so that the .

radiation dose rate in the radiation beam of the device at-45 cm (18 in-) from .

the radiation source with the device shutters, if any, in the open position does not exceed ~125 millirem per hour; and (3) In the case of byproduct material _in a device which has been installed on a vessel such as a pipe or a tank,-applies- after (3 years after the' effective date of this rule) only if the inside of =the vessel does not need to be entered under any foreseeable circumstance by one or.nore individuals and a' casual entry to the vessel _ is prohibited, or if the altj gap _

21 s

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. w7w r, s r +- -s -

e v way-e rees e w v2w s-y m v r v 3 ,-, ,--&,- a m -v mt e c --+ + m - e, e+s.+i-+me-- -w en -n- - - , . _ - -,u.<--,ew= A te e v mew eei

between the radiation source and detector of the device is less than 45 cm (18 in.).

(e) Any person who, under a general license, possesses byproduct material in a device which does not qualify after (3 years after the effective date of this rule) under paragraphs (b)(2) and (b)(3) of this section:

(1) Shall submit an application to the Nuclear Regulatory Commission, as prescribed in 6 30.6(b)(2) of this chapter, by (3 years af ter the _

effective date of this rule), for a specific license authorizing possession of that device, and other activities as appropriate; and (2) Shall, if an application is submitted not later than (30 days prior to 3 years from the effective date of this rule) in proper form for a 6,

specific license or amendment to a specific license, retain his or her general.

license until a final determination on the application has been reached by the Commission.

3. In 131.6, paragraph (d) is added to read as follows:

1 31.6 General li ense- to install devices aenerally licensed in 1 31,S.

(d) The byproduct material is contained in a device which qualifies

'after (3 years after the effective date of this rule) under paragraphs (b)(2) and (b)(3) of 5 31.5.

PART SPECIFIC DOMESTIC LICENSES TO MANUFACTURE OR TRANSFER CERTAIN ITEMS CONTAINING BYPRODUCT MATERIAL 22

4. The authority citation for Part 32 continues to read as follows:

AUTHORITY: Secs. 81, 161, 182, 183, 68 Stat. 935, 948, 953, 954, as amended (42 U.S.C. 2111, 2201, 2232, 2233); sec. 201, 88 Stat. 1242, as amended (42 U.S.C. 5841).

For the purposes of sec. 223, 68 Stat. 958, as amended (42 U.S.C. 2273);

il 32.13, 32.15(a), (c), and (d), 32.19, 32.25(a) and (b), 32.29(a) and (b),

32.54,32.55(a), (b), and (d), 32.58, 32.59, 32.62, and 32.210 are issued under sec.161b, GB Stat. 948, as amended (42 U.S.C. 2201(b); and il 32.12, 32.16, 32.20, 32.25(c), 32.29(c), 32.51a, 32.52, 32.56, and 32.210 are issued under sec. 1610, 68 stat. 950, as amended (42 U.S.C. 2201(o)).

5. In 6 32.51a, paragraph (c) is added to read as follows:

6 32.51a Same: Conditions of licenses.

(c) Transfer a device containing byproduct material to a person generally licensed under i 31.5 of this chapter only if that device qualifies after (3 years after the effective date of this rule) under paragraphs (b)(2) and (b)(3) of i 31.5 of this chapter.

Dated at Rockville, Maryland this D day of D/ b 1992.

For the Nuclear Regulatory Commission.

r

. . ( (

J.' Ch i l k'N '

Taihuel I

Secretary of tho Commission.

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