ML20044H153

Forwards Proposed Identification Scheme Re Channel Definitions for TS

ML20044H153
Person / Time
Site:	05200001
Issue date:	05/28/1993
From:	Simon B GENERAL ELECTRIC CO.
To:	Poslusny C, Stewart J NRC
References
NUDOCS 9306080004
Download: ML20044H153 (5)

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Proposed SSlf Channel liclimtions Response to Question S of NRC Staff r.omrneni.s on the Tech Spec Pilot Review

8. NRC Staff Comment Provide a TS definition of " channel." include the' combinations of" channels" that can be affccted by degraded, bypassed, m iipped condition. If necessary, distinguish be: ween dif ferent " channel" cominn.uions using individual

" channel" definitions. For example. a single sensor hvpassed could be a bypass l

to the RPS ano ECCS. A single muhiplexor " channel" failure could affect one channel of the four channel RPS input, one channel of the four channel ECCS input. several inputs to sescral displays, and one actuation channel of the one, two, or three train FCCS systemt A hypass at the RPS digital trip module does not af fect the two ESF diuital trip inodules im that channel.

(',E Resonnse llauc delimnon of < h;omel: A sei ofiniercon.. t;cd components that prorewes an idennil.JJe sign.d hom an inpui. a noint where a measurable

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output repicsem..ine of that e: #s capabil n to perform an action exists.

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Ch:m oci dc!inin. iw Insu muent i hannel voted e Ohm a dimon trom.se, sor input to TLU m Sif mp:n ol that ihvisioc m.1, des d.c i a4 <p:isition, sig al conditioning, data o ansnos+ o.. u ip pr omm et;..c ul ir.uo -.aun line to inptu af 0 eut-of 4 soien lietween dakions. h oc, wasm inpm io TLU or SLU input in the other divisim b.

Intrumeni channel (dir et i): F:om.sensoi to tr.p processing within TLU or i

51.U Thew.cr < hannch for sensor signah that.o e unique to a system in one dnwon and. u r not soted Tr:p logir thannei Fiom outp:.t n: 2-on'o:- i u.tcr within T1.U to output

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of RPS OLU ot MSlV Olr d Final outpu: (hannel (RPS 'MSlVD 1 ron o.aput of OLUs to output of load

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LSF output loop !(2) From omput ol 2-out-ui-4 toter within SLU 1(2) to c.

output of RMU ldi.

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I mal output channel WSFi. From output of RMUs to output of 2-out-of 2 arrangement ol load drivers i

Ch.mncl idemilh ation: A proposed scheme lot identification of the signal flow through the caiions channels is show n in the attat hed figures.

Datz ruewaar m tresraung semor siunak anc u!p 3:a'us are tagged with the

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idennlicanon ot :c wnsoi Ar adthnonal tag wi:1 rentesent the division of I

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tw iS 9 12:17Pt1 C-E !D:LEM BtE.1

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origin of the sensor signal and the destination. These instrument < annel tags l

are shown in the DTMs in the figures. as follows:

a.

la from Div. I to Div.1

h. Ib from Div. I to Dh 11

'g r.

Ic liom Div. I to Dh III

d. ld from Div. I to Dn. IV c.

Ila hom Div. Il to Div. I f.

lib f rom Div. Il to Div. Il

g. lic fiom Div.11 to Dn. Ill

h. Ild from Div.11 to Div. IV L etc.

These identifien are associated wah either ihe ESF DTMs or the RPS/MSIV DTMs The trip logic channels are identified by disision and comprise the voted rombination of the four DTM inputs to the 'II.l N. Thus, trip logic channel I comprises the vowd v ombinaliten ofinstrumcm ch.innels la41Ta+111a+1Va.

Final output rh.mnel I will be tr:p logir channel.md will be identified -

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. separately wah ths RP5 OI.U and MMV OI.E p.u.s the trip logic output bypass status and manual division trip or isolation stams f rom the manual switch mputs into the OI.l ts The measurabic output will he the energization status of the associated in:nl driver s The insa umem i h.umcis lier the hSF locir a ains will have an extra identifier to show that each of ihr da;d Sl.l's m a <livisio n reive.s the signal. Thus, the i

s:gnal from Dit I to Un.11 is idenulied as inso:anent channel Ibl into St.U 1 of Div 11 and Ib2 m N.li 2 ESF outpu: loops are sinn!ar in idendlication to the trip logic channels, but are aw tiated sepaiaich with the two independent M.Us and multiplexing links in

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carb of three divisions. These channels will be measurable at the RMt.1 output associated with each SI,U.

The final ou:put ( hannels foi ES) icprese:u the soted AND logic (2-out-of-2) from the RMUs and will be me:tsurabic at the outputs of the load drivers that comprise the AND locit.

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( Acronyms

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{ ANN = Annunoators or Pro &ss Corrputer h

rinst S CMU = Control Room Muthpk ring Unit gg ;, lo Adualmg 0* vites o Acuatng Dewces.

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Motor Ccmtrol Centers 0

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