ML19319D150
| ML19319D150 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 04/28/1978 |
| From: | Eschbach S BABCOCK & WILCOX CO. |
| To: | BABCOCK & WILCOX CO. |
| References | |
| NUDOCS 8003130717 | |
| Download: ML19319D150 (14) | |
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- PDS.210u s. 5 (7-77)
' FIELD' CHANGE AUTHCRIZATION BABCGCK & VIILCCX DATE C0mi NO. o x i. o. 75 a v. a E.. a uf OaGi 9ro g CUStontR
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SUPFLIER P.A.
NO.
PART NO.,
OR.
TASK N0.
GROUP N0.
SEQ.No.
Reac(tor Trio on LcC:CNas ACTERS)f FWP T. Turbine Trio
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TITLE 4AX 30 a
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DESCRIPfl0N AND JUSilFICATION OF CHANGE:
Implement reactor trip upon loss of both main feedwater pumps or upon turbine trip.
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REASON FOR CHINGE:
TASK HQ TASF TITLE DOCS (T.E. SIGN)
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O ENGINEERING REQUIREMENT 43 CR0 O CUST0HER REQUEST O iHPR0vtMENT
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l C0hCUR TO APPROVALS i CUS TOMEii/ CUS T0ftL A Aolmi DISPOSITION OF FIELD CHANGE:
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L'i EXPE0iTE FIELD CWf!GE AUTKi?IZATION-CONTItrJATION O CORMAL REFEREMCE DOCUMENT fliLI REF DOCUMEpi MO.
Reactor Trip on Less of FWP & Turbine Trip SHEET
/
OF /0 DESCRIPTION OF CHAMGE:
1.0 Purpose Produce a reactor trip in response to a trip of the main turbine or a trip of both main feedwater pumps.
2.0 Philosoohy The philosophy is that the main feedwater pumps A and B trip signals may be ANDED to yield a signal indicating loss of both main feedwater pumps. This signal may be ORed with the main turbine trip signal fanned out, and utilized to trip both CRD trip breakers.
This will re-sult in a trip of the reactor control rods.
3.0 Theory of Ooeration 3.1 Existino ICS Hardware Relays 86TT, 86 AFWPT, and 86 BFWPT including the field contacts associated with them already reside in the ICS.
Note that the field contacts close to convey the respective trip states.
3.2 Conveying Main Feedwater Pumo Trips The trip of both Tnain feedwater pumps energizes relays 86 AFWPT and 86 BFWPT. Upon loss of both main feedwater pumps relay K3 de-energizes due to the opening of parallel contacts from 86 AFWPT and 86 BFWPT.
When relay K3 de-energizes 2 output contacts cause a reactor trip by means of the CRD trip breakers.
3.3 Conveyino Main Turbine Trio A trip of the main turbine causes closure of the contact in series with relay 86TT. ~ Relay 86TT energizes. This opens a contact in series with relay K3 de-energizing relay K3.
K3 propagates a reactor trip as de-scribed in paragraph 3.2 above.
REVISED REQUIREMENTS SUPPLIER REvikl0NS l
TASK TASK TITLE i
(CONTINUATION SHEET)
No.
PREPARED BY DATE REVIEWED gy DAfE 21 ICS
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P.cac.or.*ri;.'en Loss of R P & Turbir.e Trip SHEET L
OF /0 DESCRIPfl01,0F CMtmCE:
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3.4 Turtir.e Trio Evoass In order to allow for power escallation to provide for starting the main turnir.e, a t:ypass arrangement is proviceo.
The bypass can te placed in effect cnly by manual action and ther. only if the turbine is trippcd.
Once the turbine has been started (un-tripped) the bypass automatically removes itself.
Asse.e the turbine is tripped.
85TT is r.nergized closing a contact in series with t'l.
El may non be energi:c.1 by pressing the bypass switch.
K1 will seal by means of con =ct Kl;.
Contact t'.it causes a con:rol room alam indicating a bypass stue.
Contact Kls is closed causing ret 5y K3 to energize. Witn K3 tnergized centrol rod out motion is permitted.
3.5 Main Feedwater Pumo Bvoass a
In order to allow for control rod drive testing during reactor shutdown a bypass arrangement is provided. The bypass can be placed in effect only by manual action and then only if both main faedwater pumps are
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tripped.
Once a main feedwater pump has started (un-tripped) the bypass 1
atrtomatically removes itself.
Assume both main feedwater pumps are tripped.
S5 AFWPT and 25 SFWpT are energized closing contacts in series with relay K2.
K2 may now be ener-gized by pressing the bypass switch.
K2 will seal in by means of contact K2A.
Contact K2C causes a control room alarm indicating a bypass state.
Contact K2B is closed causing relay K3 to energize. With K3 energized control rod testing can be perfon:ed.
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R EV I 5 E D R EQ';l E Ep!> TS SUPPLIER REVISIONS TA$r TASE TITLE (CONTINUAT10i $NEET)
PREPARED BY DATE REVIEWED BY DATE JCg 9EVIE*ED BY DATE I
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APPkOVED BY DATE I
SHEET OF
IDS-310%,A t.(12 76) 5
^'s E 2PE0 " E FIE.D CM1.52 AUT'em ZAT!GN-CONTINJATIO!1
[] o ruAt REF ERLnCE D00U4Emi YtiLt p R(F u c c g E s. T m3, REACTOR TP.IP 0:1 LOSS OF FWP & TURBIflE TRIP 3
0F /0 SHEET DESCRIPfl0N OF CHANGE:
3.6 I4ormalTurbineShutdownBypass In order to allcw for nomal turbine shutdown, a bypass arrangement is The bypass can be placed in effect only by manual action.
provi ded.
Depressing the bypass switch energizes Relay K4 which closes contacts K4A, K4B and K4C.
Contact K4A maintains the circuit to K4 when the bypass switch is released. Centact K4B maintains the circuit to relay K3 thus enabling shutdown of the turbine without reactor trip. Contact K4C provides an annunciatnr alem to the control room indicating that the nomal turbine shutdown bypass is implemented.
When the operator trips the turbine, Relay 86TT energizes closing a contact in series with relay K1 allowing K1 to implement the turbine trip bypass, annunciate that the turbine trip is bypassed and close contact Kid energizing Relay K5. Relay K5 then opens contact K5A denergizing Relay K4 thus automatically removing the nomal turbine shutdown bypass.
3.7 Bypass Remeval Bypasses are automatically removed as described in Paragraphs 3.4, 3.5, and 3.6.
Bypasses can be manually removed at any time by depressing the reset switch.
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TASE TASK TITLE REVISED REQUIREMENTS SUPPLIER REVISIONS (CONTINuaT10N SHEET)
NO.
PREPARED BY DATE REVIEWED BY DATE g
"O' REVIEWED BY DATE 04 APPROVED BY DATE
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' FIELD CHAtGE AUTHORIZATIO 1-cot 1 tit 0JATIC 4
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'E REFERENCE DOCUMEMI iliLE kEi DOCUHihi no.
Reactor Trip on Loss of FWP & Turbine Trip
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SHEET 7
0F /0 DESCRIPTION OF CHANGE:
Installation Instruction Turn off power to the ICS cabinets.
Install the two relay inodules in ICS cabinet 2 row 7 positions 3 and 4.
Install the bypass and reset switches.
The suggested installation location is on the blank cover located in cabinet 2 row 7 position 5.
Utilizing a wire wrap tool and 22 AWG solid strand wire, connect the relays, switches and power per the attached two sketches.
Power connection to be the
+ 24Vdc bus within the cabinet s
REVISED REQUIREMENTS SUPPLIER REV1580M5 L
TASE TASK TITLE (CONTINUATION SHEET)
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P03 210491.v(l!.F6)
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REVISED REQUIREMENTS SUPPLIER REVISIONS TASK TASX TITLE (CONTINUATION SHEET) l NO. PREPARED BY DATE REVIEWED BY DATE gl 1(b FCA NO. REVIEWED SY DATE l 04-APPROVED BY DATE O U SHEET 0F / . (Mf.YUWUIR95TTTY.', 5 e F IEL D d.V:':EAUiVrIZATICt'-CbTINUMIC $ $$[" kEF DOCUMEm! no. REFEAEWCE DOCU"inI lifLE Reactor Trip on LE,ss of F"P or Turbine Trip 7 0F /0 SHEET Ol3CRIPTt0M OF CHANGE: CHECMOJT PROCEDUP.E READ A10 STUDY THIS PROCEC'JRE COMPLETELY BEFORE STARTIrlG THE t;0TE: 1.0 Purpose The purpose of this procedure is to checkout the ICS turbine trip logic once installation has been completed. 2.0 Initial Condition A. The !i55 is in shutdown The control rod drive system is in a tripped state. B. C. The ICS is operaticnal and the plant status is so that power to the ICS can be interrupted. SHUtiT trip power is present in the control rod drive breaker cabinets. D. 3.0 Recuired Eauicment A. A.C. voltmeter capable of reading 125 VAC B. Hand Tools C. Jumper Leads 4.0 Checkout procedure In all steps where wiring is removed or reinstalled or jumpers are installed first remove power from the ICS. When measurements are called for reapply power to the ICS. Remove the module containina K4 and K5 and do not install until directed. A. Remove Power - Disconnect field contact wiring For turbine trip input /-( "/ / T/ /6, main feed-water A trip input / / /3# // ,and main feedwater B input / / /4-/ /6. Power Up - Verify that the ICS trip logic is in hn untripped state. f B. Measure for the presence of line voltage across both K3 trip contacts. (If this voltage is not present check for the presence of shunt trip power at the CRD breakers. i TASK TASE TITLE REvl3E0 REQUIREMENTS SUPPLIER REVISIONS No. (CONTINUATION SHEET) PREPARED BY DATE REVIEWED By DATE gj {c3 FCA NO. REvlEwED BY DATE 04 APPROVED BY DATE b' 0F I SHEET vw-wwwu-wpar-vtnF---- FICLQ CHAtlGE AUTFDTIIZATICN-CO.!TINUATIO?4 @6Q'l REFEREASE DOCUMEDT VITLE
- REF 20CUNimi no.
Reactor Trip on Loss of RIP or Turbine Trip SHEET G OF /o OtSctiPtion 0F CnANGE: C. Remove Power - Install jumpers across the terminals for turbine trip input. (See A above). D. Power Up - Verify that the ICS trip logic is in a tripped state. Measure for the absence of line voltage across both K3 trip contacts. E. Check the turbine trip bypass - Operate the bypass switch, flote that the turbine trip bypass annunciator in the control room is indicating a turbine trip bypass. F. Check that the turbine trip is bypassed - Measure for the presence of line voltage across both K3 trip contacts. G. Check the bypass reset - Operate the reset switch. Measure for the ~ absence of line voltage across the K3 trip contacts. Check that the turbine trip's bypassed annunciator has reset. H. Remove Power - Remove the jumper installed in C above. Install the jumper across terminals for feedwater pump A trip - Step A above. j I. Check that a single feedwater pump trip does not produce a trip out-put. Measure for the presence of line voltage across both K3 trip contacts. J. Check that the feedwater pump trip's bypass will not respond with one pump tripped. Operate the bypass pushbutton. There should be no response from the plant annunciator indicating a main feedwater pump trip's bypass. Check that line voltage is still present across both K3 trip contacts. K. Remove Power - Remove the jumper installed in step H. Install the jumper across the terminals for feedwater pump B - step A above. L. Power Up - Repeat steps I and J. M. Remove Power - Reinstall a jumper as in step H. Leave the jumper installed in step K in-place. RtvisEO REgulREMENTS SUPPLIER REvtSl0MS h TASK TASK TITLE (CONTINUATION SHEET) R0. PREPARED BY DATE REVIEWED SY DATE 21 ICS l REVIEWE0 BY DATE 04 APPROVED BY DATE SHEET OF l _.... -...- ~.. - - - - -. -- r w. o-- - ~ L [,[ ' ' FIELO,CMt ZE t.UT'.CT!IZl,TD:-CC;Dut TE:4 r EEFLREMCL DOCU4Lai ilTLE klf LLCudia! no. Reactor Trip on Loss or FW" or Turbine Trip T or R sntti DE50RIPfl0N OF CNAhCE: 1 N. Power Up - Ch'eck that with both main feedwater pumps trioped the ICS trip logic outputs a trip. f;easure for the absence of line voltage across both K3 trip contacts. 1 Check that with both main feedwater pumps tripped the feedwater trip can be bypassed. Operate the bypass switch, f;ote'that the plant annunciator alarms a main feedwater trip's bypassed state. O. Check that the main feedwater pump trip is bypassed. fteasure for the presence of line voltage on both r,3 trip contacts. P. Check that the bypass reset is operational. Annunciator no longer indicates a main feedwster pump trip bypassed. fleasure for tne absence of line voltage across both K3 trip contacts. Q. Remove Power - Remove all jumpers. R. Power Up - Reset both CRD breakers. S. ' Check trip transmission - Use a test lead to momentarily short the main turbine trip input teminals - See A above. Check the CRD breakers both should be tripped. f!DTE: It may be necessary to place the NI/RPS in shutdown bypass to complete steps R and S. REvlsED REQUIREMENis SUPPLIER REVislDNS I TAst TA5x TITLE (CONTINUAflON SHEET) NO. PREPARED BY DATE REVIEWED St DATE gj Ic3 REyltwtC BT DATE 1 Ou. APPROVED BY DATE OF /Y SHEET a PDS-210484-4(12-76) ~ ' FIELD CHAKE AUTHORIZATIOr:-CONTItUATION t Q 1E ~ REFERENCE DCCUHipi TiiLE p RET 00COMENT no. Reactor Trip on Loss of FWP & Turbine Trip SMEET /0 0F /0 DESCRIPfl0N OF CHANGE
- T.
This step prepares the equipment for the remaining steps. 1. Remove power. 2. Install the module containing K4 and K5. 3. Note that there are no jumpers across the trip input terminals-Step A. 4. Clip the voltmeter across one set of the K3 trip contacts. Caution shunt trip power is present at these terminals. U. Power up - check that the ICS trip logic is untripped. Presence of line voltage indication on the voltmeter. V. Press the bypass switch. W. Check that the bypass is in effect. Hold a jumper across the turbine trip input terminals - Step A - and note that a trip is not generated - line voltage indication on the voltmeter. Do Not Remove The Jumoer. X. Check that the bypass will remove automatically. Open the jumper and then reconnect it. Check tabt line voltage is not indicated on the voltmeter. Y. Remove power - Reinstall the wiring for turbine and main feedwater pump trip's that were removed in Step A. Z. This completes the check out procedure. REVISED REQUIREWENTS SUPPLIER REvlSIONS TA$r TA$a TITLE (CONTINUATION SHEET) P0. PREPARED BY DATE REVIEWED By DATE REVIEWED BY DATE l 04-APPROVED BY DATE I SHEET // OF /# PD3021048A-4(12-76) FIELD CHANGE AUTHORIZATION-CONTINUATION h E*h(('E o REFERinCE DOCUMENT TliLE REf DOCUMENT NO. A {~ A C, 70 R T/R/h 04/ l 03 3 W N? 0*1 Tl//( d, 7/( / /0 SHEET / OF J DESCRIPil0N OF Cf.ANGE: Inst'allation Instructions 1. Remove all power from the AC breaker cabinet before starting. 2. Locate TB1 on the source interruption device of AC breaker cabinet A and 5. 3. Add a new cable between the source interruption device A of AC breaker cabinet A and the ICS. 4. Add a new cable between the source interruption device B of AC breaker cabinet B and the ICS. 5. The termination of the cable on each source interruption device shall be as shown on sheets 2 and 3. 6. The termination of the cable on the ICS shall be as shown on the sheets for Task 21 (ICS).
- /.
The cables should be two conductor, 14 ga AWG. REvlSED RE0Vi*fHENTS
- SUPPLIER REvi$l0NS i
TASK T !. S K TITLE (CONTINUAil0N SHEET) NO. PREPARED BY DATE REVIEWED BY DATE g W & Ylkl}y kW Yb. 'll&O,* .) FEA MC. REVIEWED BY DATE 04 A P,P R,9V E D 8 DATE j ik{hf
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SHEET /. OF 0 PDS-21048A-4(l!.7G) @ E '8'E D I T E FIELD CHANGE AUTHORIZATION-CONTItfJATION O acau't REFEREhCE DOCUMENT TITLE qREF 00CUNENT NO. A E A c r o tt. T /t P Ou t 012 Of kWP or 7' v4 0 7*4 t B SMEET 8 0F3 DESCRIPTION OF CHANGE: Td/P G R E A l( E x 3 ADD NEW vABLE l7 61 n 7 E X ! STING COST GABLE E X ISTING CABLE 31 - ---of g o- - - - SOU RCE I I NTE RRUPT 10N l l OEVICE I l REvlSED REQUIREMENTS SUPPL!ER REvlS10MS tl TASu TASp TITLE (CONT 1NUAT10N SHEET) MD. PREPARED BY DATE REVIEWED BY DATE 43 Cggg3 FCA MO. PEVIEWED BY DATE 04-I APPROVED BY DATE / OF / SHEET 5 PDS-210484-4(12-76) FIELD CHANGE AUTHORIZATION-CONTINUATION ]y"8'il RtFERENCE DOCUMEhi TITLE kEF DOCUMENT no. A G /q c y p fL TA IP O AJ
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SHEET OF 3 DESCRIPfl0N OF CHANGE: YRJP 2 R & /9't< E n A i ADD NEW CABLE I --04 y EXISTING cusT EXISTING CABLE 31 CABLE -OC go_--- SOU RCE l 1 NTE ARUPT t0N DEVICE I PEVISED REQUIREMENTS SUPPLIER REVISIONS I TA$u TASK TITLE (CONTIMcAT10N SHEET) No. PREPARED BY DATE REVIEWED BY DATE 43 Cgggg AEVIEWED BY DATE 0u. APPROVED BY DATE SHEET /[ OF /Y w}}