ML20125B994

Forwards Change 1 to TS for Util Re Protection Factors for Use of Respiratory Equipment

ML20125B994
Person / Time
Site:	Monticello
Issue date:	05/11/1971
From:	Benaroya V US ATOMIC ENERGY COMMISSION (AEC)
To:	Knuth D US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9212100241
Download: ML20125B994 (1)

Text

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1 MAY 11 1971

[$ &b 5 Donald F. Knuth, Chief, Boiling Water Rosctors Branch No. 1 Division of Reactor Licensing PROTECTION FACTORS FOR THE USE OF RESPIRATORY EQUIPMENT

' From time to time we are asked by licensees that allowance be made for the use of respiratory protective equipment, persaant to 10 CFR Part 20.103(c)(1) and (3). Attached is the recent Change No. I to the Technical Specifications for the Monticello Nuclear Generating Flant (Docket No. 50-263). The contents were proposed by the.

Division of Radiological and Environmental Frotection and received the concurrence of the Office of the General Counsel. Whenever

,- a licensee asks for allowances to be made for the use of respiratory.

protective equipment, to be consistat, I recommend that the attached be incorporated in the Technical Specifications until they are officially published in the Federal Register.

'Dritindi ttenWey ykter .nsnmyn Victor Benaroya, Project leader Boiling Water Reactors Branch No.1 Division of Reactor Licensing

Enclosure:

Change No. 1 to Monticello Tech Specs Distribution:

Docked _8**J .

DRL Reading BWR-1 File Pt. Morris, DRL j

FSchroeder, DRL i Asst. Dirs., DRL Br. Chiefs, DRL BGrimes, DRL j RKlecker j DVollmer VBenaroya, DRL.

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9212100241 710S11 PDR ADOCK 05000263- PDR-p

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j[%'+, UNITED STATES 4" ' N [S ATOMIC ENERGY COMMISSION l

• d .*. '. J wase eTou, o.c. rous Idi April 28, 1971 f

Docket No. 50-263 Northern States Power Company ATTN: Mr. Arthur V. Dienhart

' Manager of Engineering 414 Nicollet Mall Minneapolis, Minnesota 55401 Change No. 1 License No. DPR-22 Gentlemen:

Your letter dated March '15,1971, requested authority to assign protection factors to the use of* respiratory equipment and to make them part of the Tcchnical Specifications of Provisional Operating License No. DPR-22 for .

the Monticello Nuclear Generating Plant E-5979.

4 During our review of the proposed change, we informed your staff that certain modifications were necessary to meet our regulatory requirements.

On the basis of our review of your proposed change, as modified, we have con-cluded that the change does not present significant hazards considerations not described or implicit in the Monticello Safety Analysis Report and that there is reasonable assurance that the health and safety of the public will not be endangered by operation of the Monticello Nuc1 car Generating Plant E-5979 in the proposed manner.

Accordingly, pursuant to Section 50.59 of 10 CFR Part 50, the Technical Specifications of Provisional Operating License No. DPR-22 are hereby changed as set forth in Attachment A to this letter.

Sincerely,

. M1 a Peter A. Morris, Director Division of Reactor Licensing

Enclosure:

Attachment A - Change to

• Technical Specifications i

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.e O_ 1 ATTAC@ENT A Change No. I to Technical Specifications Provisional Operating License No. DPR-22 l 's Northern States Power Company

• 2 Docket No. 50-263 I

Change Specifications 6.2B in its entirety to read:

"6.2 B Radiation control procedures shall be maintained and made availabic to all station personnel. These procedures shall show permissibic radiation s

exposure, and shall be consistent with the requirements of 10 CFR 20.

This radiation protection program shall be_ organized, with the following exceptions, to meet the requirements of 10 CFR 20."

a. Paragraph 20,203 " Caution signs, labels, signals and controls."

In lieu of the " control device" or alarm signal required by paragraph 20,203(c) (2), each high radiation area in which the intensity of radiation is-1000 mrem /hr or less shall be barricaded and conspicuously posted as a high radiation area l and entrance thereto shall be controlled by requiring issuance l

of a Radiation Work Permit and any individual or-group of

• individuals permitted to enter such areas shall be provided with a radiation monitoring device which continuously indicates the radiation dose rate in the area.

The above procedure shall also apply to each high radiation area

' ' in which the intensity of radiation is greater than 1000 mrem /hr, g except that locked doors shall be provided to prevent unauthorized i entry into these areas and the keys to these locked doors shall be i- maintained under the administrative control of the Shif t Foreman on duty.

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b. Pursuant to 10 CFR 20.103(c)(1)' and (3), allowance may be made-for the use of respiratory protective equipment in conjunction ,

with activities authorized by the operating. license for this

, plant in determining whether individuals in restricted area are exposed to concentrations in excess of the' limits specified in Appendix B, Table I, Column 1, of 10. CFR 20, subject to the following conditions and limitations: - .

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c. Notwithstanding any exposure limit provided herein, the licensee shall, as a precautionary procedure, use_ process or other engineering controls, to the extent practicable, to limit concentrations of radioactive materials in air to Icvels below those which delimit an airborne radioactivity area as defined. in 6 ?0.203(d)(1) .

d. When it is impracticable to apply process or other engineering controls to limit concentrations of radioactive materials to levels below those which delimit an airborne radioactivity area as defined in 8 20.203(d)(1), and respiratory protective equipment is used to limit the inhalation of airborne radicactive material, the licensee may make allowance for such use in estimating exposures of individuals to such materials providcd:

1. Intake of radioactive material by any individual within any -

period of seven consecutive days will not 'exceec' that which would result from inhalation 1/2/3/ of such material 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br /> per week, at uniform concentrations specified in Appendix B, Table I, Column 1 of 10 CFR Part 20,

2. Respiratory protective equipment'is selected and used so that the peak concentrations of airborne radioactive material inhaled by an individual wearing the equipment do not exceed the per-tinent values specified in Appendix B, Table I, Column 1 of.

this part. For the purposes of this subparagraph the concentration of radioactive material that is inhaled when respirators are worn 1/ Since the concentration specified f or tritium oxide vapor assumes equal intakes by skin absorption and- inhalation, the total intake permitted is twice- that which would result from inhalation alone at the concentration specified for 113 S in Appendix B, Table I, Column 11 for 40 hours4.62963e-4 days <br />0.0111 hours <br />6.613757e-5 weeks <br />1.522e-5 months <br />.

2/ .For radioactive materials designated "Sub" in the1" Isotope" column-of the table, the concentration value specified is based upon exposure to the material as an external radiation source. Individual exposures to these materials shall be accounted for as part of the limitation on individual dose in a 20.101. These materials shall be subject to applicable precautionary procedures of paragraph c. above.

3/ For modes of intake other than inhalation, such intakes must be con-trolled, evaluated, and accounted f or by techniques and procedures as may be appropriate to the circumstances of the occurrence with proper con-sideration of critical organs and'11miting doses, i

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3 may be initially estimated by dividing the_ ambient airborne con-centration by the prot.ection f actor specified' in Table I attached s

hereto'for the respiratory protective-equipment worn. If the.

intake of radioactivity .is later determined by other measurements i to have Feen greater than that initially estimated, the greater quantity shall be used in evaluating exposures; if it is less than that initially estimated, the lessor quantity may be used in evaluating exposures.

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3. The licensec advises each respirator _ user that he may leave the ,

area at any time for relief frv n respirator use in case of equip-ment maliuhetion, physical or psychological discomfort, or any other condition that.might cause_reduct;Ju in the protection =

afforded the wearer.

C The licensee maintains a respiratory protective program adequate 4.

to. assure that the requirements of, paragraphs _1. and 2. , above ,

are met.

Such a program shall include:

' (a) Air sampling and other surveys sufficient to identify the hazard, to evaluate individual exposures, and-to permit proper selection of respiratory protective equipment.

(b) Written procedures to assure proper selection, supervision, and training of personnel using such protective equipment.

(c) Written procedures.to assure the adequate fitting.of respirators; and the testing of respiratory protective equipment f or operability immediately prior to use. -

(d) Written. procedures for maintenance'to assure _ full effective-ness of respiratory protective equipment, including issuance, cleaning and decontamination, inspection, repair, and storage._

(e) Written operational and administrative procedures for proper use of respiratory protective equipment including provisions for planned limitations on working times as necessitated by operational conditions.

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(f) Bioassays and/or whole body counts af -individuals, and l j

other surveys, as aporripriate, to evaluate individual exposures and to' assess protection actually provided.

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? (g) Records sufficient to permit periodic esuluation.of the

adequacy of the respiratory protective program.

5. The licensee uses equipment approved by tbc'U. S. Eureau of ,

Mines under its. appropriate Approval Schedules as set forth in l

' Table I below. Equipment not approved under U. S. Bureaa of 1 Mines Approval Schedules.may be used only if the licensee has evaluated the equipment and can demonstrate by testing, or .

j on the basis of reltable test information, that tie material _'

i least-and performance characteristics of the equipment are at l

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equal to those efforded by'U. S. Bureau of Mine9 approved.

l equipment of the same type, as specified in Table I below. .,

e Unless otherwise authorized by the Commit.sion, the. licensee i 6.

1. does not assign protection _ factor.1 in excess of those specified in Table I below in selectinc and using respiratory protective

! equipment. J

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i 7. These spacifications with respect to the' provisions of E 20.103

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shall be superseded by cdoption of proposed changes to 10 CFR 20,

) Section 20.103, which would make this specification unnecessary.

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TABL2 I TO SPECIFICATION 6.2 3 ~ ~

PROTECTION FACTOR 3 FOR RESPIRATORS

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' PROlECTION FACTORS 2/ l GUIDFS TO SELECTIG*4 0F EQUIPMENT l -

SURLAU OF iTINIS APPh'AL SCHEDULES

• 2 ~~~~ DA RTICDI.ATES

• DESCRIPTION MODES 1/ AND VAPORS M!D lFOREQUIP!:EtlT CiPABLE OF PRO'.'IDIiG A  :

GASE3 EXCEPT l t EAST EQUIVALEf:. PROTt:CTION FACTORS 2 TRITIUM OXIDE 3j *or schedule saperseding for equipnent of type lirted l _ .

I. AIR-PURIFYING SESPIRATORS Facepiece, half Wask 4/ 7/ 11P 5 21B 30 C'T s14.4(b){4) ,

100 21B 30 CFR 514.4(S)(5); 14F 30 CFR 13  :

Facepiece, full 7/ NP II. aim 03PHERE-SUPPLYING i

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1. Airline respirotor 193 30 CFR s 12.2 c Type C i) 100 EGiet.e half'sask CF ,

1,000 ISB 20 CFR S 12.2 c Typc C,1) l 4 Facepiece, full CF 108 30 CFR 9 12.2 c Type C(ii)

'Facepiece, full 7/ D 500 Facepiectr, full ~~ FD 1,000 TypeC(iii) 5/

l 19t150 CFR 9'12,2 6/ c Hood CF

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Su1t CF

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2. Sel f-conta! qed Treathirg(SCBA)

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apparatus i Facepiece, full 7/ D 500 13E 30 CFR 5 ll.4(b (i) 1,000 13ti 30 CFR s 11.4(b (fj)

Facepiece, full - PD 13E 30 CFP 5 ll.4(b Facepiecs, fall R .1,000 .

III. 'COMPlNATIOP RE5PIRATOR Protection factor- 19B CFR 512.2(e) or applicable Any com6ilfiitfon of air- se.hedules as listed above purifying and atmosphere- for type and mode supply!rg respirator of operatiori as listed above __

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1 M See the following symbols:

CF: continuous flow 0: demand NP: negativepressure(i.e.,negativephaseduring inhalation)

PD: pressuredemand(i.e.,alwayspositivepressure)

PP: positive pressure R: recirculating (closedcircuit)

U (a) For purposes of this specification the protcetien factor is a measure of the degree of protection afforded by a respirator, defined as the ratio of the concentration of airborne radio-active material outside the respiratory protective equipment to that inside the equipment (usually inside the facepiece) under conditions of use. It is applied to the ambient airborne concentration to estimate the concentration inhaled by the wearer according to the following formula:

knbient Airborne Concentration Concentration Inhaled = Protection factor (b) The protection factors apply:

(i) only for trained individunis waaring properly fitted respirators used and maintained under supervision in a well-planned respiratory protective program.

(ii) for air-purifying respirators only when high efficiency

[above 99.9% removal efficienc Mines type dioctyl phthalate (y test]

00P) by U.particulate S. Bureau of filters and/or sorbents appropriate to the hazard are used in atmospheres not deficient in oxygen.

(iii) for atmosphere-supplying respirators only when supplied with adequate respirable air.

E Excluding radioactive cont minants that present an absorption or submersion hazard. For thi.ium oxide approximately half of the intake occurs by absorption through the skin so that an overall protection factor of not more than approximately 2 is appropriate.

when atmorrhere-supplying respirators are used to protect against tritium ox1de. Air-purifying respirators are not recomended for 1.m.,

use against tritium oxide. See also footnote 5/, below, concerning supplied-air suits and hoods, g

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S Under chin type only, llot reconnended for u:,e where it might be possibic for the ambient airborne concentration to reach instantaneous values greater than 50 times the pertinent values in Appendix B Table I, Column 1 of 10 CFR, Part 20, b/ Appropriate protection factors must be determined taking account of the design of the suit or hood and its permeability to the 110 protection f actor greater contaminant under conditions of use.

than 1,000 shall be used except as authorized by the Comission.

El 16 approval schedules currently available for this equipment.

Equipment must be evaluated by testing or on basis of available test information.

U Only for cleon-shaven faces.

Il0TE 1: Protection f actors f or respirators, as may be approved by the-U. S. Bureau of 111nes according to epproval schedules for respirators to protect against airborne radionuclides, may be used to the extent that they do not exceed the protection factors listed in this Table. The protection factors in this Table may not be appropriate to circumstances where chemical or otherrespiratory hazards exist in addition to radioactive hazards. The selection and use of respirators for such circumstances should take into account approvals of the U. S. Bureau of Mines in accordance with its applicable schedules.

140TE 2: Radioactive contaminants for which the concentration values in Appendix B. Table I of this part are based on internal dose due to inhalation may, in addition, present external exposure hazards at higher concentrations. Under such circumstances, limi-tatior.s on occupancy may have to be governed by external dose limits, t

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