ML20031D489
| ML20031D489 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 07/01/1977 |
| From: | Piascik T NORTHEAST NUCLEAR ENERGY CO. |
| To: | |
| Shared Package | |
| ML20031D456 | List:
|
| References | |
| RTR-NUREG-0619, RTR-NUREG-619 SP-1051, NUDOCS 8110130384 | |
| Download: ML20031D489 (10) | |
Text
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v Api'i;0('Ai..NYIO N-tm DKIE:- 7-1 77 Plant Superintendent STAT 10:1 PRO. CE. oui:E COVEl: S!!rry A.
II)EllfI!'ICATION I!u aber, SP 1051 y;gy,
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CONTROL' ROD SCRAM TIME. TEST Prepared Ily 7.c. pi 33 gip H.
IIEVIEU
-1 have reviewed the above. procedure and have found it to be sa.t-isfactory.
.TITI.E
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,Ujily..VIEUED SAFETY OjlESTION EVA1.UATION DOCUMENTATI0!! 1:Ef511 RED:
'(Sic;ni Ticant change in procedurr' 1:iethod or sco'p as tiescribed in FSAR)
YES [-]
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(1f yes, document in PORC/S01 C taceting minutes) u -
.L.l!V..Il.i.O.NME!!TAL IMPACT
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- Q (Adverse env'irorimentai impact)
YES'[]
HD (If yes, document in PORC/SORC meeting minutes).
D.
- PO!.>.C./S_. ORC APPROVAL P0kC/SUP.C Heeting !!u:ab'ar 7_[--fL6 f
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. APPL!aVAL 4MD IMPt EMEllTATION The attached procedure is h'ereby approved, and ef,fcctive on the dates below:
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o SCRAM TIMING BRUSH RECORDER TRACE Spaces indicate even position Lines indicate odd position 48 46 44 42 38 28 26 24 8
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'2 00 n
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Buffer Time 5%
20%
50%
9C%
Rod Travel Signals from Rod Drift Alarm 5%
Dropout of Position 46 20%
Pickup of Position 38 50%
Pickup of Position 24 90%
Pickup of Position 04 F%
Buffer Time Pickup of 04 of dropout of 00 w g 8?
2%
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FIGURE 10.1
SP 1051 Page 8 Rev. 3 Date:
11/12/79 8.4 Depress the Chart Speed 125 m/sec pushbutton (916).
Q 8.5 Patch the Control Rod Patchboard to the desired control rods as selected by lTie Reactor Engineer (928).
8.6 Lock the plexiglass window cover and return the key to the SS (916).
Under the direction of the Reactor Engineer, restore the' 8.7 control rod pattern to the configuration prior to the surveillance testing.
s 9.
SURVEILLANCE DATA SHEET 9.1 RE Form 1051-1, Control Rod Scram Time Test.
9.2 RE Form 1051-2, Control Rod Scram Time Test Data.
9.3 RE Form 1051-3, Control Rod Scram Time Test Data.
9.4 RE Form 1051-4, Average Scram Insertion Times for the Three Fastest Rods in a Two by Two Array.
9.5 RE Form 1051-5, Single Rod Scram Control Sheet.
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FlauaES 10.1 Scram Timing Brush Recorder Trace TGP:kat O
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SP 1051 Pagm 7 Rev. 3 Date:
11/12/75 f
O 7.14.5 Record any pertinent coments on the data sheet, 7.14.6 The strip chart (s) and Data Sheets will be transferred to thT 0ffice Surveillance File at the completion of the surveillance.
7.14.7 Calculate the average time required for 5%, 20%, 50%
and 90% control rod insertions.
Complete RE Form 1051-3 with the scram time for each control rod for 5%, 20%, 50% and 90% points.
7.14.8 Using RE Form 1051-3, record the scram insertion times for each required percent insertion and highlight each time which exceeds the tehenical specification limit. At the completion of the scram timing testing, the Reactor Engineer, or his representative, will review RE Form 1051-3.
Any two by two array having two insertion times greater than the technical specification limits will be analyzed using RE Fom 1051-4.
If the te.chnical specification limit is O
exceeded for the three fastest roes in a two by two array, management must be immediately notified.
7.14.9 The control rod scram time data reduction shall be accomplished irr,adiately after the completion of the last control rod to be scramed.
7.14.10 After completion of Data Reduction analysis forward completed Data Sheets to the ISI Coordir.ator.
8.
RESTORATION Upon completion of the Single Rod Scram Control Sheet, perfom the following:
8.1 Remove the Single Rod Scram Test Timing Mark Hodule.
8.2 Place the Recorder Start toggle switch in the AUTO position (928).
Depress the Power ON pushbutton in the Recorder (916).
8.3
d SP 1051 Page 6 Rev. 3 Date: 11/12/79
'O 7.11 Record the following infonnation on RE Form 1051-2 for each control rod s'cramed timed.
7.1).1 ControTRod Location i
7.11.2 Accumulator Pressure, PSIG 7.11.3 Any pertinent remarks 7.12 Notify the Operator to open charging valve 113.
7.13 Repeat steps 7.4.4 through 7.12 for all control rods listed in the Reactor Engineer's Single Rod Scram Control Sheet.
7.14 Data Reduction 7.14.1 Locate time zero on the brush paper at the point where the Channel 30 (right hand line) switches from
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a solid l,ine to dashed line.
NOTE:
Be careful of " double notches" where no space is visible between notches. Also look for channels that ma.y net have produced a trace at all as this becomes important when assigning rod locations to the individual O
iines on the strip chart.
7.14.2 Mark off the 5%, 20%, 50% and 90% points on the strip chart for all rods involved (refer Figure 10.1 ).
7.14.3 Utilizing the length-to-time template, convert the 5%, 20%, 50% and 90% positions into time and record these values on the Data Sheet, RE Fom 1051-2.
7.14.4 Measure the buffer times and record these values on RE Fom 1051-2.
7.14.4.1 A short buffer (no lenthening of dashes) is indicative of failure of the internal l
seals.
7.14.4.2 A long buffer time (greater than five (5) seconds at rated pressure scrams) is indicative of a plugging internal filter which couM eventually prevent the rod fror w.aming.
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SP 1051 Page 5 Rev. 3 Date:
11/12/79 If the scram timing is not completed i'n one continous sequence, the Reactor Engineer will deviate as necessary from RE Form 1051-5 to insure that the remaining control rods are scramed without causi,ng unnecessary flux spikes.
7.6 Notify the Operator located on the CRD Hydraulic Modules to close Charging Valve 113 for the rod to be scramed.
CAUTION:
DO NOT REMOVE THE TOGGLE SilITCH FROM THE SCRAM TO THE NORMAL OR SELECT POSITION FOR AT LEAST FIVE (5)
SECONDS.
7.7 Notify the SCO on duty that the rod is about to be scramed and start a countdown from three (3) seconds 7.7.1 At time approximately three (3) seconds, depress the Chart Speed 125 m/sec pushbutton on CRP-916.
7.7.2 At time zero, place the toggle switch for the rod to be scramid in the SCRAM position (center position) on CRP-916.
7.7.3 After five (5) seconds from time zero, depress the Chart Speed Stop pushbutton and reposition the toggle switch to its original position.
(NORMAL or SELECT).
7.8 Check the strip recording to verify the entire sequence has been recorded.
If not, repeat steps 7.5 and 7.7.
7.9 Record the following infonnation on the strip chart:
I 7.9.1 Date 7.9.~2 Time 7.9.3 Control Rod Location 7.10 Record the following information on RE Form 1051-2 at the start of testing.
7.10.1 Reactor Pressure, PSIG 7.10.2 Reactor Power, % or HWe 7.10.3 Date and Time 7.10.4 Initial of data recorder jo l
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SP 1051 Page 4 Rev. 3 Date: 11/12/79 O
7.2 Perform the foilowins to ready the Brush Recorder iocated on CRP-916 for scram time testing:
7.2.1 Place'Ihe Test-Auto toggle switch in the TEST position and verify the Recorder runs for ten (10) seconds
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(92'8).
7.2.2 Return the toggle switch to the AUTO position.
7.2.3 Insure the Chart Speed Stop pushbutton is depressed (916).
7.2.4 Insure the Power ON pushbutton is depressed (916).
7.2.5 Place the Recorder Start toggle switch in the f4ANUAL position (928).
CAUTION:
DO NOT SELECT MORE THAN TWEhTY (20) RODS.
7.3 At the Control Rod Patch board on CRP-928 patch in the rod (s) to be scramed on the desired channels for the strip recorder.
7.4 Connect the Single Rod Scram Test Timing Mark fiodule to CRP-916 as follows:
7.4.1 Obtain the key from the SS and unlock the plexiglass window cover.
7.4.2 Insert the One Rod Test dual plug into the One Rod dual jack located on the recorder.
7.4.3 Insert the Neutral (black) plug into the Neutral jack on the panel.
7.4.4 Insert the Rod (red) plug into the jack on the panel Control Rod Markup corresponding to the rod to be scram time tested.
7.5 Using the Single Rod Scram Control Sheet provided by the Reactor Engineer, RE Form 1051-5, select and independently verify the rod to be scramed on the CRP-905 pushbutton Martrix and withdraw the rod to position 48 (if not already fully withdrawn).
The independent verifier will initial RE Form 1051-5 in the applicable space after the control rod is selected.
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SP 1051 Page 3 Rev. 3 Data: 11/12/79 O
4.
PREREcurS1TES 4.1 Test Equipment:
4.1,1 Templ' ate relating length on Brush Recorder to. time.
4.1.2 Single Rod Scram Test Timing Mark (Channel 30)
Module.
4.2 The Reactor Protection System shall be operable as per IC 408A.
4.3 All accumulators shall be charged as per OP 302, paragraph 7.3.
4.4 Insure the Chart Recorder is supplied with sufficient paper to perform this test.
4.5 Scram timing will be performed only when the reactor is at power conditions, not to exceed 25% power.
5.
INITIAL CONDITI0t45 5.1 Obtain permission from the Shift Supervisor (SS) for authorization to commence testing.
SS will initial Data Fonn, indicating his permissior, is granted.
5.2 Position an operator at the CRD Hydraulic Modules.
6.
PRECAUTI0 tis 6.1 All procedure steps shall be coordinated with the Control Room Operator.
6.2 When the Individual Rod Scram and Select Switch on Panel 916 is in the SCRAM position it must remain there for at least five (5) seconds in order that the control rod is allowed to fully insert and not be caught somewhere in its travel.
6.3 To insure approximate full plant scram conditions during single rod scrams at normal accumulator pressures valve 113 on the CRD Hydraulic Module shall be closed to isolate the module from the charging water system.
7.
PROCEDURE 7.1 Initial Data Form indicating Prerequisites and Initial Conditions are met and Precautions noted.
SP 1051 Pag 2 2
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Rev. 3 Date: 11/12/79 O
1.
' OBJECTIVE 1.1 To verify the control rod insertion times are within the limits as set fo7th in the Technical Specifications.
2.
ACCEPTANCECRITERId 2.1 Scram Insertion Times The average scram insertion time, based on the de-energization of the scram pilot valve solenoids as time zero, of al! operable control rods in the reactor power operation condition shall be no greater than:
% Inserted from Average Scram-Fully Withdrawn Insertion Times (sec.)
5 0.375 20 0.900 50 2.000 90 3.500 2.2 The average of the scram insertion times for the three fastest O
coatro' rode or 11 9roups or four coatroi rods ia two by two array shall be nc greater than:
% Inserted from Average Scram Fully Withdrawn Insertion Times (sec) 5 0.398 20 0.954 50 2.120 90 3.800 2.3 The maximum scram insertion time for 90% insertion of any operable control rod shall not exceed 7.00 seconds.
3.
TECHNICAL SPECIFICATION REFERENCES 3.1 Technical Specifications:
3.3.C, 4.3.C 3.2 FSAR III - 5.3 3.3 Inservice Inspection Program O
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$P 1051 Page 1 l
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CONTROL ROD SCRN1 TIME TEST Page No.
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