ML20149L341

Application for Amend to License SNM-1107,requesting That Interpretation of Nominal Positive Pressure Be 2 Inches of Water for Gloveboxes Operated W/Atmospheric Controls for Product Quality.Schedule of Revs Encl.Fee Paid

ML20149L341
Person / Time
Site:	Westinghouse
Issue date:	01/25/1988
From:	Nardi A WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP.
To:	Rouse L NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
28988, LA-88-02, LA-88-2, NUDOCS 8802240195
Download: ML20149L341 (7)

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Electric Corporation Draw A CcWMa Sam C3'ohra 29250

=S03 776 2610 January 25, 1988

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U. S. Nuclear Regulatory Commission f6 g

ATTN: Mr. Lelend C. Rouse

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Uranium Fuel Licensing Branch 3',"

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Dffice of Nuclear Material Safety and Safeguards j

Division of Fuel Cycle and Material Safety i

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Gentlemen:

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PEF:

A. J. Nardi to W. T. Crow (LA 86-57, August 8,1986)

StN-1107, Docket 70-1151 A Westinohouse amendment application was submitted on August 6,

1986 requesting review and approval of criteria for use of positive pressure oloveboxes with atmospheric control for product quality.

The proposed criteria, to provide for radiation protection, consisted of: controlling the high integrity boxes to a nominal positive pressure, orovide high pressure alarms, air sampling at work stations, and recirculatino the atmosphere through HEPA filters sufficient to provide 9pproxinately 20 air changes per hour.

With NRC approval, September 3, 1986, license StN-1107 subparagraph 2.2.5.3 was revised to incorporate the above proposed critieria.

Although the proposed criteria did not specify the magnitude of the nominal positive pressure, it was intended to be no areater than 2.0-iach of water, not 0.1-inch as stated in the safety evaluation report dated August 8,

1986.

The 0.1-inch water internal pressure is stated in subparagrapn 2.2 5.3 but, aoplies cnly to gloveboxes operated at a negative pressure.

I An interlock mecnanisim is proposed to prevent over-pressurization of the j

alovebox.

This interlock will exhaust the glovebox to a HEPA system.

The relief interlock pressure (i.e.,

a pressure above the nominal but below the actual glove burst pressure) will be set to provide a sufficient factor of safety to prevent glove ruptures and ensure the integrity of the glovebox.

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Page 2 January 25, 1988 Therefore, Westinghouse requests in the form of a license amendment, as attached, that the interpretation of nominal positive pressure be 2-inch of water for gloveboxes operated with atmospheric controls for product quality.

In addition, an interlock or other pressure relief device (ventilated to a HEPA system) shall be provided to ensure the integrity of the glove boxes.

If you hnve any questions, please write or telephone me at (803) 776-7610, Extension 3247.

Very truly voors, A. J. Nardi, Manager FYS License Administration Im WP1978E:3p.2 Enclosures

2.2.5.3 tihen containment of uranium dust by conventional vcntilation hoods is not possible or impractical, gloveboxes may be used.

Ventilation systems for gloveboxes and other completely enclosed devices shall be designed and operated with a nominal negative internal pressure (approximately 0.1 inch water minimum with respect to ambient air) sufficient to maintain the concentration of airborne radioactivity from the serviced equipment below 10CFR20 limits.

Gloveboxes shall be equipped with instrumentation for measuring differential pressure, which shall be checked at least monthly when the equipment is in operation.

When atmosphere control is required for product quality and where there is unencapsulated radioactive material in ventilated glovebexes, the following criteria shall apply:

(1) Gloveboxes shall be designed for high integrity.

(2) Gloveboxes shall be operated with a nominal positive internal press'1re.

(3)

Internal atmospheres shall be continuously recirculated chrough HEPA filters at a flow rate designed to attain approximately 20 atmosphere changes per hour.

(4) Alarms shall be provided to indicate when the pressure exceeds the nominal posit 19 pressure.

(5) An interlock or other oressure relief device shall be provided to exhaust the glovebox with a sufficient factor of safety to ensure its integrity.

(6) Representative air sampling shall be performeo at operator work locations.

2. 2. 5. 4 Ventilation hotds and gloveboxes shall be constructed primarily of metal, glass ard/or fire resistant plastic.

Plastics shall conform to a Class I fire rating (e.g., Lexan).

2.2.5.5 Ducts shall be designed to minimize accumulations of StN and shall be inspected for StN on a routine basis commensurate with the potential for StN accumulations.

2.2.5.6 Exhausts from gloveboxas, hoods, local exhaust and similar devices, when employed for radiation protection purposes, shall be passed through HEPA filtration.

HEPA filters snall be replaced either on a routine scheoule or when airborne concentrations, hood velocities, differential pressure drop or DOP (or acceptable substitute) penetration measurements indicate that replacement is necessary.

The maximum differential pressure oermitted across a HEPA filter shall be 8 inches water for negative pressure systems and 4 inches water for recirculating positive pressurized systems.

2.2.5.7 Exhausts from inplant recirculating air cleanup

systems, including gloveboxes, hoods, local exhaust and similar devices shall either be penetration tested or sampled for airborne radioactivity concentrations at least monthly.

2.2.6 Air Samplina 2.2.6.1 Air sanoli@ equipment selected to be suitable for detecting and evaluating the concentration of airborne radioactive Docket No. 70-1151 Initial Submittal Date:

4/30/83 Page No.

2.2-3 i

License to. StN-1107 Revision Submittal Date: 1/25/88 Revision No.

16

SCHEDULE OF REVIS10NS Page Revision Page Revision Number Nunber Number Number i

15 1.5-2 2

11 10 1.5-3 2

lii 16 1.5-4 2

iv 3

1.5-5 2

y 15 1.5-6 2

vi 16 1.6-1 2

vii 14 1.7-1 2

viii 12 1.7-2 2

ix 16 1.8-3 2

1.0-1 2

1.8-2 2

1.0-2 15 1.8-3 2

1.1-1 2

1.8-4 2

1.1-2 2

1.8-5 2

1.2-1 2

1. 8-6 2

1.3-1 2

1.8-7 2

1.3-2 11 1.8-8 2

1,3-3 2

1.8-9 2

1,3-4 2

1.8-10 2

1.3-5 2

1.8-11 2

1.3-6 2

1.8-12 2

1.3-7 2

1.8-13 2

1.4-1 2

1.8-14 2

1.4-2 2

1.8-15 2

1.4-3 2

1.8-16 2

1.4-4 2

1.8-37 2

1,4-5 2

1.8-18 2

1.4-6 2

1.8-19 2

1.4-7 2

1.8-20 2

1.4-8 2

1.8-21 2

1.5-1 2

1.8-22 2

Docket No. 70-1151 Initial Submittal Date:

4/30/83 Page No, iii License tb. StN-1107 Revision Submittal Dite: 1/25/88 Revision No.

16 l

SCHEDULE OF REVISTONS Page Revision Page Revision tArnber Number Number tAnoer 2.0 1 15 2.3-11 2

2.1 -1 2

2.3-12 2

2.1-2 2

2.3-13 2

2.1-3 2

2.3-14 2

2.1-4 2

2.3-15 3

2.1-5 2

2.3-16 deleted 2.2-1 2

2.3-17 2

2.2-2 2

2.3-18 2

2.2-3 16 2.3-19 2

2.2-4 3

2.3-20 2

2.2-5 3

2.4-1 3

2.2-6 2

2.5-1 7

2.2-7 2

2.6-1 5

2.2-8 2

2.7-1 3

2.2-9 2

2.7-2 3

2.2-10 2

2.7-3 2

2.2-11 2

2.7-4 2

2.2-12 4

2.7-5 2

2.2-13 4

2.7-6 2

2.2-14 15 3.0-1 2

2.'-l 4

3.1-1 2

?.3-2 4

3.1-2 2

2.3-3 3

3.1-3 2

2.3 4 2

3.1-4 2

2.3-5 2

3.1-5 2

2.3-6 2

3.1-6 2

2.3-7 2

3.1 -7 2

2.3-8 2

3.1-8 2

2.3-9 2

3.1-9 2

2.3-10 3

Docket tb. 70-1151 Initial Submittal Date:

4/30/83 Page No.

vi License No. StN-1107 Revision Subnittal Date:

1/25/88 Revision to.

16

REVIS10N RECORD Revision Date of

?Jumber Revision Pages Revised Revision Reason 13 7/23/87 tew pages 1.11-6 Added authorization for tnrough 1.11-8.

off-site drying of calcium fluoride.

14 8/14/87 Revised page 4.5-1.

Added drying of calcium fluoride to scope of operations.

Revised pages 4.8-1 Delete Western Zironium and 4.8-2. -

as an authorized recipient of W.

Revised page 4.1-1.

Uodate document date.

Revised pages 1.11-2, Added encapsulated 1.11-4, 1.11-5, and materials to bri.quetting 1.11-6.

desciption.

15 8/18/87 New pages 1.14-.1 thru Added criteria to 1.14-5 and 2.2-14.

preclude foreign contaminants from UF6 cylinders.

16 1/25/88 Revised page 2.2-3.

Add interlock pressure requirement positive pressure glovecoxes.

Docket No. 70-1151 Initial Submittal Date:

7/23/87 Page ib.

ix License to. SPN-1107 Revision Submittal Date:

1/25/88 Revision tb.

16

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