ML20137M267

Rev 0 to Tray Cover Exemption for Safety Trays Under Non-Safety Raceway

ML20137M267
Person / Time
Site:	Clinton
Issue date:	01/08/1985
From:	SARGENT & LUNDY, INC.
To:
Shared Package
ML20137M160	List: ML20137M163 ML20137M167 ML20137M175 ML20137M185 ML20137M193 ML20137M197 ML20137M206 ML20137M215 ML20137M239 ML20137M267 ML20137M281 ML20137M287 ML20137M300 U-600412, Forwards Calculations Providing Design Basis for FSAR Discussion on Electrical Separation,Including Rev 0 to 19BD-2,19BD-8,19BD-11,19BD-12,19BD-13,19BD-15,19BD-16 & 19BD-17 & Rev 1 to 19BD-5,19BD-7 & 19BD-10
References
19-BD-13, 19-BD-13-R, 19-BD-13-R00, NUDOCS 8601280229
Download: ML20137M267 (2)

Text

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o Cales For Trav Cover h m tion for Cale. No. 19-80-13 SARGENT hlUNDY

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4536-00 Eamo No Apotoved by

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Purpose:

_ The purpose of this analysis is to demonstrate.that Class JE. cables

_ routed in uncovered trays which are located under non-Class.lE sable in uncovered solid bottco trays or conduit do not require covers _

_ for internally generated faults / fire provided a one inch minimum t..._._ __separa tion is maintained.

Separation requirements for external _

.ha ards are not. addressed.in_this analysis.'

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_lua tification:. _,. _._ i,.__.

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_ Hegulatory_Gulde_1.754278_ and IEEE_.184-1374l_addrless l

aepara tion._!_,

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__.dne.to.toth internally _ generated. fire.and_ external._hazarda..__.Since

__ external _ha:ards..iincludind_ehposurc 11'rek1_ N abd$csbed n

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i specific _ studies _with. specific Iequiraments l this;_ analysis _wi1Lhe L i

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_. _. limi'ted_to_ addressing.'. internally g.cnersted.f'auits2f dres

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_ __._for__danage po tential limited..to[ interna'lly. generated _f.ailures tor'

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. _s epara tion _ dis tance _can be. established by. analysis _o, f_',the. propo sed.}.._,

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'_ca.ble _ina,tallation d Q.therwise a3.er.ical saparation of_thrne ' f ecAL_._

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_in_.ca hl e_.;sp r.e a ding _'ar e s s_.a nd..f iv e _l e e.t.in ' g.cn c r a lLp la rtt_a ran s._ishall _ ;

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PDR ADOCK 05000461

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c.ic.N. 19-ao-13 cm, r w c,v r,e-., e n., enr SA.9 GENT k LUNDY 3,,,3.

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y l Lfety-Reisted Non-Lfetv-Related f59e 2

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Prciect C1inton R eviewed bv Date l

Aaoroved by Dets l

Prei. No.

4536-00 Eamo No.

Justification: (continued)

The cable which is installed in.the trays on the Clinton Project, i_s _'

._ IEEE-383 qualified _ fire retardant cable.

Also, the_ design _ basis _ is_.!

.that trays will not be. filled above the side rails.

Whenever the I

r.aceways _(i.e. conduit or solid bottom uncovered tray) with only. _

_ non-Class lE cables pass over. an uncovered tray with Class lE

.. _ cables, t.he_results of an. internally _generat.ed_ fault 4 fire in the h _..._ essential _ tray can _only aff ec_t _that _diyj.sion_of _the_ cables _. and.t_h_e.__}

[_ ___non-Class' lE cables.which are not required.f_orisafeishutdown.'

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.i Internallv_Senera ted f aultsHir_es_inithe__rion'-esse' tial racewa[will n

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only. aff ect_the non-. Class _lE _ cabling _because heat f rom internal _ly; l

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.. generated faults / fires _will rise _;thus.not_aff ecting_the cables below

, Covers _pn non-Class lE_ __l

[. _._prov.ided.a one _ inch.. air _ gap _ is_Uti).ited..

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_ __.. cable _ tray will_not. provide _any.. protection _forlthe Claas _1_E' tray _ '

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-- _._non-Class lE raceways.are._over_ Claha,lE. uncovehad Aray_s And_t here is l

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