ML20058L844
| ML20058L844 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 05/05/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9305130029 | |
| Download: ML20058L844 (2) | |
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i GE Nuclear Energy l
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l C=neral Elecesc Company
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l CL Currect Lme. S.v>.ict.r. C4 S5??S I
t May 5,1993 Docket No. STN 52-001 l
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Chet Poslusny, Senior Project Manager l
Standardization Project Directorate -
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Associate Directorate for Advanced Reactors and License Renewal Office of the Nuclear Reactor Regulation
Subject:
Submittal Supporting Accelerated ABV/R Review Schedule - DFSER Open Item 19.1.6.4-1 l
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Dear Chet:
i Enclosed is a SSAR markup for DFSER Open Item 19.1.6.4-1 supplementing the April 16,1993 phone call.
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Please provide a copy of this transmittal to Glenn Kelly.
Sincerely, i
ack Fox i
Advanced Reactor Programs l
I cc Jack Duncan (GE)
Norman Fletcher (DOE)
Chandra Oza (GE) 1 r
JI=44M l
9305130029 930505-.
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PDR ADOCK 05200001 A~
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AMM 2346ioorn Standard Plant nev n tested an*d bears a UL (or equal) label for a three (1) 64,000 Btus per sq ft of room area, maximum hour rating.
allowable average exposed combustible loading without an automatic fire suppression (2) Fire barrier walls which are of the special system. This is termed the normal construction described in Subsection 9A3.6 or of combustible loading limit (NCLL).
other approved construction types bearing a UL (or equal) label for a three hour rating.
(2) 128,000 Btus per sq ft of room area, maximum average allowable exposed combustible (3) Fire doors, which are required to have a UL (or loading (cable insulation) for electrical equal) label certifying that they have been tested equipment rooms. This is termed the for a three hour rating per ASTM E119, electrical room combustible loading limit including a hose stream test.
(ECLL). Transient combustible loadings A& t A other than minor amounts required for (4)(lectrical penetrations, which are o Hypts maintenance of the equipment in the electrical listen.
required to have equipment rooms are not allowed.
beenty,e o ASThTEIIrwhose st_ ream aest1s'feguired.
(3)
Electrical cable insulation in trays with solid metal bottoms may be counted at one half the ing penetrations, which are of th isted total combustible loading in the tray due to the in Appen ar e to have been fact that they can only burn on the top surface type tested to E119.-A-hoscetre= tsj; of the tray. Heat transfer from the ignition seqd -
source to the cable insulation in the tray is reduced by the intervening metal.
c,(p) Fire dampers, which are required for any HVAC duct penetrating a fire barrier and must have a (4)
Cable insulation in solid bottom, solid-cover rating of three hours. The only fire dampers trays need not be considered to be a separating divisions are in the HVAC duct for contributory combustible load to an area if secondary containment (six total). The plant there is no ignition source other than the arrangement minimizes fire dampers.
cables or if it can be shown that any ignition source external to the tray is not capable of v (7) Columns and support beams, which are required raising the temperature of the heat affected to be of reinforced concrete construction or zone in the room to the auto ignition enclosed or coated to provide a three hour rating temperature for the cable insulation.
if of steel construction.
(5)
Cable insulation in condait is not considered 7 (8) Backup of the fire barrier penetration seals by to be a contributory combustible fire load to the HVAC systems when the HVAC systems are the area.
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operating in the smoke removal mode. This backup feature is accomplished in the reactor (6)
Transient combustibles such as lubricating oils and control buildings by maintaining a positive and grease, cleaning solvent, etc.in small static pressure for the redundant divisional fire quantities and in approved containers are areas with respect to the fire area with the fire.
permitted.
Leakage is into the fire impacted area under sufficient static pressure to confine smoke and (7)
Transient combustibles such as bags of hear to the fire area experiencing the fire, even if protective clothing are permitted within the there is a major mechanical failure of the constraints of items (1) and (2). If it can be penetration seal.
shown by analysis or testing that flames from the burning transient combustibles will not 9.5.1.0.4 Combustible Loading lihly impinge directly on cables within trays or risers, the contribution from the cable Allowab!c combustible loadings for the plant insulation need not be considered in were established as follows (See Appendix 9B, calculating the total combustibles in the area Subsection 9B.23 for additional details):
with the transient combuntible load.
N Amenomen 22 T4) Both ends of all electrical ar piping p et ons between 95-t.0.2 g a the divisions and between a division and a non-division shall be f TT I quaufied to the same stand.rd and tested to ASTM E119.
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