ML091380434

Meeting Slides, SM-0902 Txs Rte Param Change Enable, Overview

ML091380434
Person / Time
Site:	Oconee
Issue date:	04/15/2009
From:	AREVA NP
To:	Office of Nuclear Reactor Regulation
References
TSC 2007-09, Suppl 16
Download: ML091380434 (15)

Text

SM-0902 TXSRTEPA M Change Enable Overview TXS RTE PARAM Change Enable Design - April 15, 2009 1

Hardware specific details of the TXS RTE Parameter Change Enable Keyswitches SM-0902 Logic Overview

" Input Logic

" Parameter Change Enable Logic

• Latch Logic Illustration for Parameterization o RTE Modes of Operation o RTE Mode Change illustration for Test/Diagnosis

• Output Status Logic SM-0902 Failure Modes

• Failure Modes as described in RAI Response to EICB 106.

TXS RTE PARAM Change Enable Design - April 15, 2009 2

TXS RTE Param Change Enable FTI&I Yýayswi"tches Three (3) RPS/ESFAS Parameter Change Enable Keyswitches:

Channels A/Al, BIB1, and C/Cl Two (2) RPS (only) Parameter Change Enable Keyswitches:

Channels D and E/MSI Three (3) ESFAS (only) Parameter Change Enable Keyswitches:

Channels A2, B2, and C2 One (1) ESFAS ODD Voter/Status Parameter Change Enable Keyswitch One (1) ESFAS EVEN Voter/Status Parameter Change Enable Keyswitch Same key code for a solitary ONS unit, different key codes across the three ONS units Keys are non-removable in the ENABLE position 3

TXS TXS RTE PARAM Change RTE PARAM Design -- April Enable Design Change Enable 15, 2009 April 15, 2009 3

TXS RTE Param Change Enable Keyswitches (3ým (D To ESFAS Status Computer rii 24VDC  :

L!LS30_]L S430 RPS Channel ESFAS Voter ODD F1/F2 D or E/MSI. and ESFAS Voter ODD Keyswitch Status H Keyswitch input input signal to signal to TXS ESFAS TXS or Channel A2 or ESFAS Voter Even G1/G2 B2 or C2 and EVEN Status I Keyswitch

ýeyswitch input input signal to TXS igna+t0A&TCM Enable Design - April 15, 2009 E D4

A - - -

o eLogic PI rcessmr'giL I -I L -I I a1 i

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t utputfStatus Logic 3I

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TXS RTE PARAM Change Enable Design - April 15, 2009 5

Input Processing I  !

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1PPSFU0902A Physical Keys~witch. I  !!

1PPSFU0902B Input Representation 1PPSFU0902C 1PPSFU0902D I

0A 2f I I I I I To I Output/Status Logic Ht - = - - - I- - -

w 0

Of r- .1 xi A

Chang ýEnable SO-0000, FU-0001, FU-0003, FU-0004, FU-0005, FU-0006, FU-0007, FU-0008, FU-0009, FU-001 0, FU-001 1, FU-001 4, To Param FU-0015, FU-0016, FU-0017, FU-0019, SI-0703 Change Logic TXS RTE PARAM Change Enable Design - April 15, 2009 6

ParameterChange Enable Logic From Input Processing Logic r --------------- I I

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7XS RTE PARAM 7XS RTE Enable Design Change Enable PARAM change April 15, 2009 besign -- April 15, 2009 7

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ýL3tch L Case 0: Cyclic Operation,Keyswitch OFF 8

7XS PARAM Change RTE PARAM 7XS RTE Design -- April Enable Design Change Enable 15, 2009 April 15, 2009 8

0 Latch Lcýý7.!.Fc Case 1: Cyclic Operation,Keyswitch ON TXS RTE PARAM Change Enable Design- April 15, 2009 9

FILatch LouicI Case 2: Parameterization 7XS RTE PARAM Change Enable Design - April 15, 2009 10

0 Latch Lc Case 3: Parameterization,Keyswitch OFF 11 15, 2009 L w9mIt-11-3 1,! TXS FARAM Change RTE PARAM TXS RTE April 15, Design-- April Enable Design Change Enable 2009 11

TXS _u"7717 Modes of 0,ý,7eration with-cyclic processing of RI w ~-fl $ ~

Test operation of FDGs, setting of signals I RTE-INPUT Enable Operation Enable Parameterization Enable Function Test Enable Diagnosis TXS RTE PARAM Change Enable Design - April 15, 2009 12

.B-PARAM02; RTE Mode Changes 01 RTE - INPUT 4-PARMID!

Enable Operation Enable Parameterization Enable Function Test Enable Diagnosis Initiation by Service Unit(additional key release required)

Automatic Transition 13 TXS RTE 7XS PARAM Change RTE PARAM April 15, Design -- April Enable Design Change Enable 2009 15, 2009 13

OutputlStatus Logic I

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.!! t II II Ii I' II II II II II II I - 9 I Surmmary Alarm/St~atus Logic I TXS RTE PARAM Change Enable Design - April 15, 2009 14

FailureModes There are 6 types of Failures that can occur affecting the Safety Channel SM-0902 software or SW Parameters: This is a summary of the responses to open item 19 evolving into EICB 106

• Failure of the Parameter Change Enable Keyswitch S430 Module Failure

• Random bit error in RAM (Changeable Parameters affecting safety functions)

• Random Bit error in RAM (affecting Runtime Environment)

• Stuck bit in RAM

• Bit error in FEPROM

-No single failure allows undetected access to the safety processors or undetected changes of processor modes of operation 15 TXS RTE TXS PARAM Change RTE PARAM April 15, Design -- April Enable Design Change Enable 2009 15, 2009 15