ML20081M140
| ML20081M140 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 05/17/1991 |
| From: | Astrom K, Menozi V, Regis A COMMONWEALTH EDISON CO. |
| To: | |
| Shared Package | |
| ML20081L949 | List: |
| References | |
| FOIA-94-285, FOIA-94-302 DOP-0400-02, DOP-400-2, NUDOCS 9503310202 | |
| Download: ML20081M140 (22) | |
Text
__ . . . _ _ ___
" 4, unaa tsas DOF 0400-02 k',.,i. " ' -
REVISION 06
I Requirements:
- 1. Technical Specifications:
- a. 3.3.B. LCO, Control Rods.
- b. 4.3.5, Surveillance. Requirements, Control Rods.
1 Special Controls / Reviews:
NONE.
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$UPERSEDED K. Astrom Originator V. Menori Independent Reviewer / Verifier (If Applicable)
EXHIBIT /O A. Reris Department Procedure Writer PAGE / OF. PAGE(S) 39,92{,0 55 M. Korchvn=*v
/ Department Supervisor APPROVED ZDOP01/63 (ZW/441) NAY I 7 '91 1 of 22 '
9503310202 941028 PDR D. O. S* R*
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D g U )
WMAA 4%JJ k4J . , .' 5 DOP 0400-02 REVISION 06
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ROD WORTE MINIMIZER A. PURPOSE: This procedure provides the steps necessary to Initialise, Operate - and Request Information from the RWM. This procedure provides the klet requirements as well as defining when the Riet is required. This procedure also outlines the requirements and functions of an independent verifier. , B. USERS
REFERENCES:
- 1. Technical Specifications:
- a. 3.3.B. LCO, Control Rods.
- b. 4.3.B. Surveillance Requirements, Control Rods.
- 2. Procedures: '
- a. DAP 7-13, Control Over Computer Operations.
- b. DAP 9-11, Procedure Usage And Adherence.
- c. DGP 1-1, Unit 2/3 Normal Unit Startup.
- d. DGP 1-2, Unit 2/3 Startup to Bot Standby.
e. DGP 1-3, Unit 2/3 Unit 2/3 Bot Standby to Power Operations.
- f. DGP 1-S1, Unit 2/3 Master Startup Checklist,
- g. DGP 1-S2, Unit 2/3 Minimum Startup Checklist.
- h. DGP 1-S3, Unit 2/3 Master Outage Checklist.
- i. DGP 2-1, Unit 2/3 Normal Unit Shutdown.
j. DGP 2-4, Unit 2/3 Shutdown from Power Operation to Hot Standby. k. DGP 3-4, Control Rod Movements-Control Rod Sequences.
- 1. DOA 0300-12 Mispositioned Control Rods.
- m. DOS 0400-02, Rod Worth Minimizer Prestartup Surveillance.
- n. DTS 0400-01, Initializing and Loading Sequences into the Rod Worth Minimizer.
W th n iz r g
- p. DAN 902(3)-5 B-3, Rod Worth Min Block.
ZDOP01/65 7 (ZW/441) 2 of 22 D.O.S.R.
r- , Un&& 44J/ fid...*
- 4. * *'
' DOF 0400-02 REFISIM 06 5.
- 3. ' FSAR. Dresden Station, Unite 2 & 3, Volssse 2, Section. 7.9, Rod Worth Minimiser.
k 4. Prints:
., s. 12E4833(125-7833), schematic Diagram, Rod Worth Minimiser.. -
1 System Pt. 1.
- b. . 12E4833(125-7833)A, Sc'h ematic Diagram, Rod Worth Minimiser System, Pt. 2.
- c. 12E4833(125-7833)R, Schematic Diagram Rod Worth ~Minimiser System, Pt. 3.
- d. 12E4833(128-7833)C, Schematic Diagram, Rod Worth Minimiser System, Pt. 4.
C. SUFFLEMENTS: NONE.
- D. PREREOUISITES:
- 1. RFIS is operable.
- 2. RMCS is operable.
... 3. The control rod sequence has been loaded into and verified for
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the Ritt Computer (DTS 0400-04, Initializing and Ioading Sequences Into the Rod Worth Minimiser). -
- 4. One of the two Ritt Computers shall be operating for the purpose of monitoring the control rod movements during a reactor startup as required by TECE SPECS 3.3.8.3.b.
E. PRECAUTIWS:
- 1. Depressing either of the Initialize or Diagnostic pushbuttons will temporarily apply rod blocks until'the system returns from its requested processing routines and latches onto the correct ,
sequence step.
- 2. Clear all Rod Drift Alares prior to withdrawal of any control rod when the RWM is in service, Rod Drifts that occur while a control rod is being withdrawn sho. tid be cleared when they occur. 4
- 3. The RWM MODE Switch is only to be placed into the SEQ (Sequence i Download) position when directed to do so by DTS 0400-01 Initializing and Loading Sequences Into *Ihe Rod Worth Minimiser, or DTS 0400-05, Modifying and Loading Sequences into the Rod Worth Minimizer.
APPROVED t ZDOP01/65 NAY17 31 (ZW/441) D.O.S.R.
r 1 WIT 2(3) h... - w osoo.e2 ' 1 REVISION 06 !
- y. ' LIMrTArrnme Aun AcTroBfR
~( 1.- RW Requirements. (Per TECE SPECS) I
'I
- a. When Required '
The RW shall be operable whenever the Reactor Mode Switch is in' the Startup/ Rot Standby or the Run Modes with reactor power equal to or less than 20 percent power. II the RWM fails af ter the first 12 rods are fully withdrawn ,
'second operator or qualified technical person may.be IEEli a used i
i as a substitute for the RWM. The RWM may also be bypassed for low power physics testing, demonstration of shutdown ) margin requirements of TECE SPEC 3.3.A.1., if a nuclear i i engineer is present and verifies step by step movements of ,{
- the control. rods of the test procedure. 't
- b. Operability Requirements. l To consider the RWM operable the following must have been performed:
(1) The control rod withdrawal sequence for the RWM verified as being correct. (2) The RWM On-line Diagnostic Test successfully completed. ( (3) Proper annunciation of the select error of at least one Out-of-Sequence rod group' verified. control rod.in each fully inserted (4) The rod block fimetion of the AWM verified by I attempting to withdraw an out-of-sequence control rod beyond its block point. l I 2. MBEtt the RWM is in operation with the AWM MODE Switch in the l I NORM position. IREt[ rod movements are monitored by the. RWM through all power ranges.
- a. i The RWM generated control rod blocks will always function below the Low Power Setpoint (LPSP) (20 percent power).
They can be selectively enabled / disabled when above the , LPSP by using the Toggle Control Rod Blocks (via the Main j Menu of the RWM). ! This action will maintain the RWM rod block rods. function through the withdrawal of all the control b. WHElf the Toggle Control Rod Blocks option in enahled (enabled automatically when the RWM is-Initialized or returned to service), Il[ Elf Step F.2.c.(1) and F.2.c.(2) conditions apply at all power levels. ( APPROVED ZDOP01/65 (ZW/441) 4 of 22 D. O. S. R.
m - w A6 4 4
}A.
DOF 0600-01 Lg7 *i
- Rgyzstm 06 F. 2. c. MgEN the Toggle Control Rod Blocks option'la diambled,'EEEE Step F.2.c.(1) and F.2.c.(2) conditions 1302 apply when .
below tho'LFSF, when power is less than or equal to 20 percent Rated Core Thermal Power (RCTF). (1) H the operator deviates from the sequence enforced by
]- the RW computer such that one insert error _ exists, _.
2M the RM Cathode Ray Tube (CET) will indicate that rod in a Magenta background and will apply rod-withdrawal blocks to all rods except for the rod with the withdrawal error. Additionally, the' rod with the insert error will have an insert block applied to'it to prevent further rod insertion. I 3 (2) II an operator deviates from the sequence enforced by. the RW computer such that one withdraw error exists, , ZEEE the RW generates a rod withdraw block to all I control rods to prevent further, rod withdrawal. The !
-RW CRT (Cathode Ray Tube) indicates the control rod I with the withdraw error in a red background and an
, associated error messape at the bottom of the RM CRT screen identifying the erroneous control rod. ALL control rod movement is blocked except for the insertion of the erroneous rod.
- 3. MREN the RW is in service and the Toggle Control Rod Blocks option la enabled, 2EEN rod blocks will be applied whenever a r rod drift is detected. The R W continuously scans the core at '
10 second intervals until two consecutive identical readings are found for the indeterminate control rod or the rod drift signal is reset. -A control rod with an invalid position will be-displayed on the RW CRT with two question marks-(ff) displayed ' in Red. Any control rod displayed with red question marks are ~ j considered to be withdraw errors and must be corrected prior to continuing the sequence.
- 4. A Substitute Rod Position can be entered for a rod that is displayed on the RWM CRT as erroneous, identified by two Red -
question marks (??), if its position can be determined by other means. Rods with substituted rod positions will have their positions displayed in a Yellow background. MBEM a substitute 1 rod receives a valid rod position from RFIS, IEEN it will' ! i replace the substituted position with the valid rod position and j the operator is notified through the RW CRT. A limit of 10 i substituted rod positions are allowed. t
- 5. WHEN the reactor is above the LFSF, 20 percen': RCTF (Rated Core Thermal Power), IEEN the RWM rod blocking functions may be disabled for the purpose of performing control rod pattern adjustments. Upon completion of any series of control rod !
maneuvers, which resuic in an indicated control rod position error on the RWM, a Qualified Nuclear Engineer (QNE) shall immediately correct the error on the RWM and re-enable the RWM blocking f' unctions. gg i ZDOP01/65 I 5 of 22 7 1 , D.0.S.R.
,,, u % !
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I ". - agTISION 06' l F. 6. IE the RW is NOT available AEIEg the first twelve control rods have been withdrawn but before reaching the LFSF in the ' 9%#~ STARTUF/ SOT STANDBY or RtBf Modes or the RWM is incapable of providing rod blocks (e.g., Toggle Control Rod Blocks option is : disabled). 2EEN a second licensed operator or a qualified technical person will fonction as an independent verifier to ! ensure the Nuclear Station Operator (N90) at the control panel ! is fully adhering.to the instructions of the Control Rod ' Sequence Package (CRSF). a.. The Independant verifier is responsible for the followings. (1) The current control rod pattern is in compliance with the CASP (Control Rod Sequence Package). 1
* (2) The correct control rods are being selected by the NSO (Nuclear Station Operator), then withdrawn or inserted .i
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in the proper order and to the position designated in ) the CASP before proceeding to the next rod in that .j step. , l l (3) Initialing the completed CRSF.
- b. In emergencies or situations requiring inmediate action when the RW is incapable of providing rod blocks, control rod movement may be initiated as required and a second e
operator or qualified technical person will be substituted for the RWM as soon as possible and will verify previous and subsequent control rod moves.
- 7. The RWM shall be operational during all modes of operation -
i
.EKCEPT for the following conditions: )
-l i
- a. Mechanical Failures, which include but are jglI limited to the fallowing: l (1) E::tinguished White A(B) STAND-BY Light.
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(2) Inoperable CRT. ' (3) Failure to Initialize. (4) Failure of DOS 0400-02, Rod Worth Minimizer Prestartup Surveillance. (5) System generated messages describing the failure of the system to generate the appropriate rod
- i. block / permissive actions.
i The on-line diagnostic pushbutton may be depressed at any time to investigate the status of the system. APPROVED I ZDOP01/65 NAY 17 3I l (ZW/441) 6 r 22 D. O. S. R.
; x_ _ -- -
w.i .
- m
^
- M 0400-02 ~
L{l . Ratzsica 06
. F. 7. a. -* Failure of the self-diagnostic routine signals a failed system.
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During the diagnostic routine, temporary rod blocks are applied and the annimiciator energised (DAN 902(3)-5 B-3, R0D WORTH MIN BIACK). At the. completion of a successful diagnostic routine the rod blocks will be removed and the annunciator abould be reset.
- b. Maintenance Activities. 3 Computer personnel may request the RW be bypassed temporarily to allow for maintenance or testing. Shift ,
personnel must observe the applicable portions of TECE SPECS prior to removing the RW from service and when returning the RW to service. (1) The RW may be switched to the alternate computer at the request of the Information Services Surervisor or his designate during maintenance conditions. l
- c. Sequence Icading.
The QNE (Qualified Nuclear Engineer) may request the RWM mode switch be placed into the SEQ position when loading a
,.. sequence into the RW computer.
- 8. Failure of the current RW computer is indicated by the White STAND-BY Light extinguishing.
- a. Selection of the backup RWM requires Operations Shift Supervisor permission.
- b. Permission must be documented in the appropriate Startup or Shutdown procedure as'well as the appropriate logs.
9. The Rod Out-Of-Service Function allows a rod to be removed from its array AFTER it has been driven fully into the core (position 00). l
- a. l When the reactor is operating within the Low Power Setpoint 1 Sequence (LPSS) range (less than or equal to 20 percent l RCTP) only eight rods may be taken out-of-service provided !
they meet the requirements of the LPSS (Iow Power Setpoint Sequence) analysis. l t
- b. The RWM will enforce these requirements by allowing or disallowing the out-of-service function (LPSS analysis does {
NOT allow rod movement below 20 percent Rated Core Thermal Power if a rod is fully or partially withdrawn and j I I exists to support operation with such rods). incapable of insertion u ZDOP01/65 (ZW/441) NAY17 5 7 of 22 D. O. S. R.
i}* ' i 4Bf!T 2(3) - 1 noP 0400-02
, REVISION 06
. F. 9. c. Out-of-Service rods will be displayed on the RW CRT back lit in Cyan.
} Si' 10. The Rod Test Function is to be used during shutdown conditions t when the testing of one rod is to performed. '
- a. The R W will allow the Rod Test function-to be used M if
!. all rods are fully inserted into the core (position 00) or L at alternate limits (position 02). 1 b b. Selection of the Rod Test function when there is more than 1 one rod NOT fully inserted will cause rod blocks to be applied and the requested function to be aborted.
- 11. The rules applying to the use of Alternate Limits are as follows:
- a. Any number of rods can be set at alternate limits of 02 and 46.
- b. Below the LPSP, a maximum of 3 control rods with position l limits corresponding to any of the LPSS defined notch limits can have alternate limits enabled. )
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- c. When above the LPSP there are no restrictions on the number of enabled Alternate Limits based upon LPSS.
- d. A QNE HWiI be notified prior to enabling an Alternate Limit to insure preconditioning limits' or other parameters are g- not violated. '
- e. The Alternate Limit for a control rod will deactivate !
automatically when the rod is no longer at an Alternate l Limit. The operator will be notified by an appropriate message on the RWM CRT.
- f. Allowable Alternate Limits for control rods are as follows: l l
(1) Position 02 is an Alternate Limit for position 00. (2) Position 46 is an Alternate Limit for position 48. (3) A rod position one notch IN f rom the programed limit for the current step.
- 12. For the purpose of this procedure the word " verify" is defined to mean: To make sure by taking the necessary or appropriate actions, i.e., if a valve, swltch or damper is HDI in the f
j specified position it is to be placed in that position prior to } proceeding on to the next step of the procedure. l
- 13. The RWM mode switch is only to be placed in the SEQ position when a sequence is to be loaded per DTS 0400-01, Initializing and Loading Sequences into the Rod Worth Minimizer, or, DTS 0400-05,' Modifying and Loading Sequences into the Rod Worth APPROVED
\ Minimizer.
ZDOP01/65 MAY 17 '91 (ZW/441) 8 of 22 D. O. S. R.
j-
. f. s tRtIT 2(3).
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DOP 0400 42 REVISION 06 l F. 14. h Rlet may be' switched to the alternate system at the request
%.. of the Information Services Supervisor.or his designee during maintenance situations.
j
- 15. h Power Reduction function is enabled by the operator when there is a.need to quickly reduce reactor power. h operator is able to request this function from any screen except the scram screen and, of course, the power reduction screen. This function has 3 methods of operation, as follows:
a. h first method restricts the rod insertion to individual CRAM arrays, one array at a time. Once all of the rods in each of the CRAM arrays have been inserted to 00, the a
' normal sequence may be used for further rod insertions upon .
exiting the function. N operator will work backwards through the sequence stopping the insertion of each rod at its insertion limit. ~ b. h second method makes no distinction between rods in the different CRAM arrays. - All rods ~ defined in the CRAM arrays will be considered part of the latched group. Once all of the CRAM arrays have been inserted to 00, the normal sequence may be used in the same menner as described in Step F.15.a. for further rod insertions upon exiting the function. . r c. The third-and last method uses the normal sequence, in
" reverse order. ,1f CRAM arrays have not been defined. N Rtti will display the main screen with a message saying no CRAM arrays are defined, and will remain latched to the current step. . 16.
The Rod Exercise func' tion allows 1 rod to be driven 1 notch from its initial position to test the rod drive capa'sility. Additionally, a rod at position 00 can be. withdrawn 1 notch. If another rod is selected prior to returning a rod to its initial position, the selected rod will be treated as a selection error with the insert and withdraw blocks applied. The exercised rod must be returned to its initial position before another rod is allowed movement. h Rod Exercise function should also be used when DOS 300-2, Stall Flow testing, is being performed. The RlR$ will HQI prevent a rod from mistakenly being withdrawn one notch, but will issue rod blocks to prevent the rod from being withdrawn further than one notch. .
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APPROVED i
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WOP 01/65
"' ;ZW/441) 9 of 22 D. O. S. R.
-( ' , WIT 2(3)
DOP O W 2 ' REVISIW 06' F. 17. De Scram Timing function allows' 1 rod to be scrammed. This I. function anticipates that the selected rod will be scrammed. Q scrammed rod is indicated by the receiving of the drift A ' indication and by detection of non-driven movement of the selected rod. An alarm will be given if the drift signal is received but motion of the selected rod is not detected. If the drift indication existed at.the initiation of the function, the alarm will be based on a 3 minute time delay af ter the initiation of the function or the selection of a different rod. ' 18. The Scram fisiction will display any rod at a known position other than 00 in red, any rod at an unknown position in yellow (by indicating "ff"), and rods at position 00 in green following a reactor scram. The function will be automatically displayed 1 upon the initial indication of a seren, unless the function was disabled. Once the SCRAM function is initiated, rods can be inserted or withdrawn. If a rod is withdrawn, the function ' automatically returns to normal operatioci. G. PROCEDURE: ' 1. Place the RWM in service as follows: l l 1. l ( AllswitchesandpushbuttonsarefoundonFanel902(3)-5unlessl l l otherwise noted. The CRT is the operator interface, it has a touchscreen bezel mounted within Fanel 902(3)-5. ) l i l 2. The STAND-BY Lights indicate which R W Computer is available for tracking control rod movements and ready for service. l l The ON-LINE Light indicates which system is currently l selected and serving as the functioning RWM. l i j i _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _I : a. Select the RWM computer that has its STAND-BY Light lit.
- IE both A and B STAND-BY lights are lit, IEEli select A by turning the RWM COMPUTER Switch to the A position. ,
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- b. Observe the Red A(B) ON Light is lit.
- c. Verify the RWM MODE Switch is in the NORM position.
i l____________________________________ NOTE I l l Depressing the Initialize or Diagnostic pushbuttons will l temporarily apply rod blocks until the system returns from its l requested processing routines and latches onto the correct step. l
/ l
_________________________________A_PPROVED ZDOF01/65 (ZW/441) MAy 17 '91 10 of 22 D. O. S. R.
- i * .
IRf!T 2(3) .l ,,
- Dop N2 RNISIN 06 ,
G. 1. d. Depress.the SYSTEM INITIALIZE pushbutton.
- 2. ' Operator Interface, Al#1 CRT Main Screen:
f
, s. Full Core Display: -
4 e , I unza . I : l The full core map (Main Screen) will be displayed whenever rod l movements are in pr. ogress unless the RWM MODE Switch is in BYP ; l or SEQ Position.- l , x i (1) The full core display of the Riet shows the coordinates ;
. and the current position of all rods in the core as '
seen by the Riet. (2) Rods in the current latched step are shown in Green. 5 (3) Rods with substituted positions are shown in Yellow. I 1 (4) Rods taken Out-Of_ Service are shown in Cyan. (Light > Blue) + (5) Rods with insert errors are shown in Magenta. i (6) Rods with withdraw errors are shown in Red. l
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(7) The remaining rods are shown in White. - i
+
(8) All even control rod positions from position 00 to 48 are disp 1syed.
- Rods with unknown positions that do NOT have a .
substitute value will show two question marks (ff) in l Red. ' Rods at position 48 will show two plus (++) symbols. 1 (9) The selected rod will be shown in inverse video. This means the rod condition, outlined in steps G.2.a.(2) i through G.2.a.(7), will have the color surround the black position indication. ! (10) There will only be one rod shown in inverse video at a time. APPROVED j .
\' 1 ZDOP01/65 NAY l 7 '91 :
(ZW/441) I u r 22
- D. O. S. R. !
l
3 fo W69 A6 4W/ 1l~~, ..,' .30F 0400 . REVISION 06
*= G. 2. b. Sequence Information.
a Tk4" ' (1) On the. lef t of the Atti CRT the following will be , displayed: i
- Selected control rod information. ;
- Selected rod position. !
e The respective rod blocks for a selected rod are I identified by the individual bars, a Red bar directly ! below the bounds missber will identify the withdraw > block, and a Magenta bar directly above the bounds ! number will identify the insert block. These rod i blocks will identify the current rod block enforced on f the selected control rod. !
- Current latched step number. j Array name of the currently latched step.
i i
- Allowed movement limits for all rods in the currently !
latched step. (2) The top portion of the RWM CRT will display the . following: j e
- Status of the LPSP (whether above 20 percent DR below 20 percent). .
- Whether the Toggle Control Rod Blocks option is '
enabled DR disabled for all rods. ,
- Unit Number D2(D3) and selected RWM computer A(B). '!
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- Sequence name currently loaded into the RWM computer. j
- A readout of the 24 hour clock residing within the RWM i computer. ;
(3) The right side of the RWM CRT will have touch boxes to ' select the following: I i
- Power Reduction.
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- nain Menu. APPROVED 4
- Secondsry Function.
gg7g .
- Review Screens. '
- Special Modes. D. O. S. R* .
3 i (4) ' The bottom lines on the RWM CRT display error messages ; and system prompts. l ZDOP01/65 ; (ZW/441) 12 of 22 i
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- WMAA 4%JJ
, g' .; , . . , .DOP O W 2 (
REVISION 06 '
"* . G.- 3. Selectable Options from the Main Screen.
M6- 4 s. ' Power Reduction (see Section F.15): l r I mzs I-l This function allows CRAM arrays to be inserted for emergency l conditions (e.g., cold water transient due to loss of feedwater l heaters). l (1) Insert tha control rods displayed in green to position 00 until desired power is reached (the Ritt will latch to individual CRAM arrays), or
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(2) Select ARRAY MODE option and insert the control rods displayed in green to position 00 until desired power ' level is reached (the Ritt will latch to ALL CRAM array rods). l (3) . After all CRAM arrays are inserted to position 00 or ! if E CRAM arrays are defined, exit the function and ) insert control rods in reverse sequence order until i desired power level is reached.
- b. Main Menu:
f
*' (1) Selection of this option will result in a secondary i screen with the following options (to activate th's functions, touch the appropriate box):
Enable or disable the SCRAM function.
- Enable or disable the Toggle Control Rod Blocks function between 201 and 1001 power.
Enable or disable the Audible Tone (alarm) above the ! LPSP. l Enable or disable the control rod movement logging function.
- Print the Loaded Sequence at the system console in the computer room.
i
- Print the System Status and Present Control Rod j Pattern at the system console in the computer room. j i
- Print the Event Log at the system console in the computer room.
(..
- Initiate a Full Core Scan. APPROVED l
ZDOP01/65 NAY 1 7 1 1 (ZW/441) i 3 f 22 D. O. S. R. i
. unnzu>
.;*- DOP 0400-02 REVISI(W 06 L
~' C. 3.. c. Secondary Functions: { Sh. _ _ (1) ENTER SUBSTI1VTE POSITION: I e I l This function allows substitute positions to be entered for rods l at unknown positions.
- Only those control rod positions dispisyed in yellow or displayed as ?? will accept a substitute position.
*. Select the proper control rod on the touch screen by touching its position indication on the screen.
- On the left side of the full core display set the desired position on the Bar Graph by touching the desired position on the touch screen.
- Confirm your request by touching the ENTER REQUEST box.
Touch the EKIT FUNCTION Box to return to the Main
- Display. ;
(2) ROD OUT-OF-SERVICE: I nozz I - l This function allows control rods to be taken Out-Of-Service and l driven to position 00.
- A maximum of eight rods may be taken Out-Of-Service.
To select the function touch the R0D OUT-OF-SERVICE , box. Select the proper control rod on the touch screen by , touching its position indicator on the screen.
- Confira your request by touching the ENTER REQUEST box.
- H the control rod is HQI at position 00, IHfH insert it fully into the core to position 00.
i
- H excessive reactivity addition is encountered. THEN ENTER DGA-7, Unpredicted Reactivity Addition, AND notify the Operations Shif t Supervisor.
APPROVED ZDOP01/65 + g } 7 'gj (ZW/441) 14 of 22 D.O.S.R.
- . ,- N INIIT 2(3)'
nor 0400-42 REVI815 06 C. 3. c. (2) h
- Touch. the EKIT FUNCTION Sex to return to the Main Display.
- An Out-of-Service control rod will have insert blocks and withdraw blocks applied at all times.
- ENABLE ALTERNATE LIMITS:
I muz l l This function allows for selection of an Alternate Limit for l 3 a control rod. It allows up to 3 control rods to have Alternate l Limits. l To select the function touch the ALTERNATE LIMIT box.
- Select the proper control rod on the touch screen by touching its position indication on the screen.
- Confira your request by touching the ENTER REQUEST box. ;
The Alternate Limit for the rod will deactivate i automatically when the rod is NO longer at an . Alternate Limit. s
- d. Review Screens: .
. (1) Event Log Review:
This option will allow the operator to review the most recent error messages or system codes. This screen will show messages in groups of 20 in chronological order, with the most recent 20 messages shown first. The operator will select which grs tp of messages to view by touching the bar area at ti.e left side of the screen. (2) Status Review: This screen provides information regarding various system inputs / outputs and also contains logs of Substituted Out-Of-Service Insert Error, and Withdraw Error rods. (3) Sequence Review: This option allows the operator to review the entire sequence by paging through the entire display. It is intended to be an aid in evaluating any abnormal
- conditions.
pggg ZDOP01/65 15 of 22 N0Y I7 'Ol D. O. S. R. l
E' .',. . , . asen zu)
. - DOP 0400-42 RETISION 06 G. 3. d. . (4) CRAM Array Reviews -
Vfg This option displays the selected CRAM arrays. If the loaded sequence does not have any CRAM arrays defined, the user will simply be informed that no CRAM arrays are loaded. C. 3. e. Special Modes: (1) ROD TEST l m l l 1. This function allows only one specific control rod to be withdrawn or inserted for testing without control l l rod blocks applied.
.l l 2.
The Ritt will allow the Rod Test function to be used MILI l if all control rods are fully inserted in the core
, l (at position 00).
----_-___________---______---_______l To select the function touch the ROD TEST box.
Select the proper control rod on the touch screen by touching its position indication on the screen.
, Confira your request by touching the ENTER REQUEST box.
The selected control rod may now be moved to perform the test without any control rod blocks applied. e Touch the EKIT FUNCTION Box to return to the Main Display. (2) Rod Exercise - (See section F.16): I_-___________-______________________ e l l / rod at position 00 is allowed to be driven out one notch. Withdraw blocks will not be applied to rods at 48 to allow l l for uncoupled rod checks and stall flow testin _ _ _ _ _ _ _ _ _ _ - - - - - _ _ _ - - - _ _ _ _ _g.-_________ .l From the main screen, TOUCH the SECONDARY FUNCTION box to display appropriate options. To initiate ROD EXERCISE, TOUCH the ROD EXERCISE box. Only one rod at a time can be exercised one notch from :
, its initial position.
IDOP01/65 1 (ZW/441) N4/17 '91 16 of 22 D.O.S.R.
.. , W IT 2(3) e l =.n. : e
< s;g.
'~
' BOF 0400-42 REVISION 06 G. 3. a. (2)
#5j,
- If Stall Flow testing is'being performed, only one rod at 'a time at position 00 or 48 will be allowed to be tested. Rod Blocks will be applied, if a rod is o mistakenly withdrawn one notch so that tho' rod cannot "
be withdrawn further than one notch. , e
- To exit ROD EKERCISE, TOUCE the EKIT FWCTIM box. -
(3) Scram Timing - (See Section F.17): 4 I unzz l i t
, l This function allows the control rod scram timing operation of the l contecil rod drive system.
- From the main screen, 2005 the SECONDMLY FUNCTION box to display appropriate options.
- To initiate SCRAM TIMING. TOUCE the SCRAM TIMING box. '
- SELECT the rod to be scram timed. l
<
- IE the rod is not at position 48, 2EEN WI11tDRAW the l rod to position 48. -
l l
- SCRAM the end to position 00. l
' i
- If necessuy, repeat Steps C.3.e.(3)(d) and (e) until l satisfactory data is available.
- Return the rod to its initial position.
Repeat Steps G.3.e.(3)(c) through (g) for remaining rods.
- To exit scram timing TOUCE the EKIT FUNCTION box.
(4) Scram Mode - (See Section F.18): I nozz l l This function scans the core af ter a scram and displays the status l of all rods (i.e., ROD OUT, ROD UNKNOWN, ALL IN). l I I
.. APPROVED <
J ZDOP01/65 NkY 17 'Oi (ZW/441) 17 of 22 D. O. S. R.
. - . . ~ ~ . .. . ~~- = .- -. .
o -?
,- WIT 2(3)-
a , y;, . . nap osos.og REVISION 06 G. 3. e. (4) ' Nf>: From the main' screen. TOUCE the SECONDARY FWCTIONS box to display appropriate options. I maze I- t l The scram screen will also be automatically displayed upon the initial indication of a scran, unless the function has been disabled. l
- To initinte SCRAM MODE, TOUCE the SCRAM F W CTI M box.
- Fully' insert rods that are not at position 00.
- To exit SCRAM FUNCTION, TOUCH the EKIT F W CTION box.
- 4. Switching to the Backup Al#1 computer:
- a. E it is necessary to switch to the backup Riel Computer, i IEEN verify the backup computer has passed the Rod Worth '
Minimiser Prestartup Surveillance, DOS 0400-02. b. H NEITHER RWM computers are available, IEEN an independent verifier must insure the followingt
* (1) . Current control rod pattern is in compliance with ,the -
loaded sequence by demanding an OD-7 Option 7 from the Station Process Computer, DR by reviewing Panel ! 902(3)-5 and verifying that the control rod pattern is in complete agreement with the signed off sequence steps. (2) Correct control' rods are being selected by the N80 and ' subsequently inserted or withdrawn in proper order and ; position as designated in the CRSP before proceeding i to the next control rod. (3) WHEN each step has been completed,and verified. IEEN initial (as the independent reviewer) the CRSP.
- c. H the alternate computer White STAND-BY Light is ,
illuminated. IEEN turn the RWM COMPUTER Switch to the ! backup system.
- d. Verify the RWM MODE Switch is in the NORM position.
- e. Observe the A(B) ON Light is illuminated for the selected system.
.- APPROVED l 2DOP01/65 NAY17 31 j (ZW/441) 18 af 22 D. O. S. R.
g -- u_
., 13 FIT 2(3) l.
DOF 0400-42 REVISIINI 06' C. 4. f. Depress the SYSTEM INITIALIZE pushbutton and verify
' 0 successful completion of the routine by observing there is
$ N0 change in the annunciated status of the RI#t (There are N0 additional alarms). i
!: g. Verify the sequence name displayed at the top of the Ritt 1.
CRT is identical to the name found on the most recent change log. . (1) H it is not identical, TIEN contact the qNE.
- 5. Error Messages and Acknowledgments:
! I nazz l
~
l The Ritt system will generate messages during normal operation. l These messages will be written to the bottom three lines of the l main screen, the error log, and the system console in the main l computer room. If the messages are informational in nature, the l audible toner (alarm) will be turned on for a fraction of a l second with NO operator action required. For messages of a l more critical nature, the audible toner will require the operator l to acknowledge the alarm by touching the box titled
- l AIARM ACENOWLEDGE in the lower right corner of the Riel CRT. l I
,. I
- a. An INSERT ERROR of only one notch can be corrected by one of the following methods:
(1) Withdraw the insert error rod one-even notch to correct the "in sequence" position. (2) Enable an Alternate Position for the control rod with the insert error. (3) H there is more than one insert error or the rod is mispositioned by more than one even notch, IEEN ENTER DOA 0300-12 Mispositioned control Rods.
- b. A WITHDRAWAL ERROR of one even notch may be corrected by inserting the control rod with the withdraw error to '
correct its "in sequence" position. H there is more than one rod with a withdrawal error or the rod with the withdrawal error is withdrawn more than one even notch past its correct insequence position, IEEN ENTER DOA 0300-12 Mispositioned Control Rods. i APPROVED ZDOP01/65 (ZW/441) > 19 of 22 D.C.S.R. i 4
UNIT 2(3)
] ,, , : ;*".. , DorO W 2 REVISION 06 C. 5. c. For control rods that have. Indeterminate positionst perform gg of the following corrective actions in the
*%l order specified:
(1) H position indication can be assured by alternate
===== (e.g., 902(3)-5 panel, 4-rod display, or OD-7)
- 2EEN use the substitute position function. '
(2) Move the control rod to a valid position and enable
.the alternate limit.-
(3) Use the rod out of service function.
- d. Messages Requiring Acksowledgment:*
- II the message listed below appears, IEEN perform the !
following actions: l i
/
.e l
l l i
, APPROVED i
ZDOP01/65 W 17 '91 l (ZW/441) l l
* *' \
D. O. S. R.
n - - _ ~ ~ _ - . . _ . _ . . _ . -_ 1811T 2(3)
- I ,,- ' .. ... -'
DOP 0400-02 1: ...- REVISION 06. Mammage: Operator Actions:
&Fu.
[ (1) RFIS MALFUNCTION: RW (1) Initiate repairs to the C&llllGI track control rod RFIS and initialise the 7 c movements as no valid RW when repairs are information is available. completed. f (2) R M yAILED IN APPLYING A (2) Switch to the backup RW WITEDRAW BLOCK if it is available and (PERMISSIVE): The RW initiate repairs on the ; output hardware has failed system. E the malfunctioned and can ll0 failure is common to both longer restrict control rod systems, 3IB( declare the system inoperable and mavements.
. refer to TECE. SPEC Section 3.3.3.3. -{
Immediately initiate i repairs of the RW. (3) RW FAILED IN APPLYING (3) Switch to the backup RW INSERT BLOCK (PERMISSIVE): if it is available and The RW output hardware has initiate repairs on the malfunctioned and can 110 failed system. H the longer restrict control rod failure is common to both
, movements. systems, 2EEli declare the system inoperable and
" refer to TECE. SPEC Section 3.3.3.3. '
, Insediately initiate repairs of the RW.
(4) ROD BLOCK /ECEO MISMATCH: (4) Contact computer personnel Portions of the RW output to initiate repairs. If hardware requires message G.5.d.(2) or maintenance. System may C.5.d.(3) is receive, continue to operate properly follow the Operator Action as long as messages for that message. C.5.d.(2) or C.S.d.(3) above
, are not also received.
APPROVED M4V 17 '91 ZDOP01/65 , (zwisal) D. 0, S'. R* 21 of 22 I l
y 'y ,, , . . (BlIT 2(3) ,
-r i : DoF 0600 -
. REVISIW 06 ;
"*\ Mamange: Operator Actions (5) OUT-OF-SERVICE ROD NOT FULLY - (5) Move the control rod to .
' INSERTED: Operation under position 00 and refer to this condition is E I TECE SPECS.
permitted. (6) DEPARTURE FR(NI BFWS BELOW (6) 'R the reactor is actually BFWS WARNING: During power below the LFSF,3EElf level changes near 20- contact the qNE. H the percent power, the operator problen is with the should always reach CRSP instrumentation, 2EElf BFWS b makpoint when above contact the. computer ; the LFSF. personnel to make repairs..
, (7) POWER LEVEL CRANGE TO ABOVE (7) Verify there are E insert (BELOW) TEE LFSF (20 Forcent errors or E withdraw Power): Rod blocks will be errors.
given on any out of sequence movements when below the f LFSF (20 percent power). (8) INCONSISTENT POWER LEVEL (8) Record the current power INDICATIONS: The Iow Power level and the status of Alarm Point (LPAF), at 35 the LFAP (Iow Power Alarm percent power, and the LFSF Foint) and the LFSF from l ' convey conflicting power the Status Screen. Notify levels. computer personnel to make repairs. (9) RWM Standby echo off: (9) Contact computer personnel . Bardware failure has to initiate repairs. L occurred. (10) BACKUF Ritt NOT AVAIIABLE: (10) Contact computer personnel to initiate repairs. B. DISCUSSION: NONE. W. WRITER'S
REFERENCES:
- 1. Specification For Rod Worth Minimizer, Rev.1. o Appendix A Bardware Requirements. '
Appendix B Software Requirements.
- 2. Banked Position Withdrawal Sequence, NEDO 21231.
- 3. " Transmittal of NFSR-0075, Revision 0, ' Control Rod Sequencing Simplification' to Advanced Nuclear Fuels," NFS:BRD:90-028, meno i f rom R.J. Chin to F.F. Kelter, March 1,1990.
, APPROVED ,
ZDOP01/65 (ZW/441) MlW 17 $1 Z2 of 22 D. O. S. R.
, , . _ . . _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ . _ . _ _ _ _ _ .}}