ML18082A937
| ML18082A937 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 08/07/1980 |
| From: | Public Service Enterprise Group |
| To: | |
| Shared Package | |
| ML18082A922 | List: |
| References | |
| 90.4, NUDOCS 8008190542 | |
| Download: ML18082A937 (18) | |
Text
START-UP PROCEDURE 90.4 UNIT NO. 2 EFFECT OF S/G SECONDARY SIDE ISOLATION ON NATURAL CIRCULATION 800 81 9 051.t SUP 90. 4 Salem Unit 2 Rev. 2
OBJECTIVES 1.1 Determine the effect of Steam Generator Isolation on Natural Circulation con-ditions.
1.2 Verify that natural circulation can provide sufficient flow to remove decay heat after a partial loss of heat sink.
1.3 Verify that natural circulation can be re-established in the primary loop after the Steam Generator is returned to service.
1.4 To provide operator experience with natural circulation operations. As many licensed operators as practical shall perform or observe this procedure.
1.5 To provide a vehicle for conducting an isothermal temperature coefficient measurement at reduced T This measurement is not an objective if the avg special test program per se. However, the opportunity to make this measurement will be taken, at the discretion of the T/E, in conjunction with the ~ NTD/Nuc Ops engineer present *
(
Salem Unit 2 SUP 90.4 Rey. 2
REFERENCE 2.1 SUP 90.0 Natural Circulation Special Tests Sequencing Document 2.2 SUP's 90.3/90.5, Natural Circulation with Decreasing Pressure.
2.3 SUP 90.9A, "Forced Circulation Cooldown".
2.4 SUP 80.l, "NSSS Startup Sequence".
2.5 Unit 2 Technical Specification 2.6 Salem Operating Instructions
2.7 Westinghouse P.L.S. for NSSS, Rev. 7
- SUP 90.4 Rev. 2 Salem Unit 2
- PREREQUISITES 3.1 Brush recorders (or equivalent) are connected as per section 8.2 and calibrated.
3.2 The W reactivity computer is operable recording reactivity, flux, and Th and Tc (wide range) as outlined in section 8.3.
3.3 The P-250 trend recorder is in operation recording the parameters listed in Appendix A.
3.4 SUP's 90.3 and 90.5 have been completed and the saturation meter is operational.
and calibrated by virtue of these test completions.
3.5 The Test Engineer has briefed all personnel involved in the conduct of the test.
3.6 Station QA has been notified of the start of this test.
3.7 The special operator instructions given in SUP:.90, Section 9.1.4 are posted conspicuously in the control room.
3.8 The 5/G Lo-Lo .alid lo level reactor trip setpoints have been reset to 5%.
3.9 41'he NIS power range high flux (low setpoint~. Trip setpoint has been reset to
.583 volts and the intermiediate range high flux trip has been reset to 28 µa.
These setpoints are equivalent to 7% RTP.
SUP 90.4 Salem Unit 2 Rev. 2
INITIAL CONDITIONS 4.1 The reactor is critical at HZP test condition as per the low power physics testing program, approximately 5xl0- 6 ICA 4.2 Bank D at approximately 160 steps with rod control in Bank D select.
4.3 All four RCP's are operating 4.4 Feedwater to the Steam Generators is supplied by the Auxiliary Feed System with level maintained.at about 33% (N.R.).
4.5 Steam Generator chemistry conditions are established to permit securing blow-down for the duration of the test.
4.6 Steam pressure is maintained as directed by the Test Engineer, using condenser steam dump in the steam pressure mode of control, at 1005 psig.
4.7 The Pressurizer Level control is in automatic maintaining level at about 22%.
4.8 Charging and Letdown are in normal service.
4.9 Incore T/C presentation showing hottest T/C (Test 41) is displayed on the P-250
- video screen.
4.10 The boron concentration of the pressurizer and RCS are within 20 ppm.
4.11 Three RCS boron analyses taken at 20 minute intervals are equal to within 10 ppm.
- 4.12 Reactivity as displayed on the W reactivity computer is approximately zero and constant.
4.13 Pressurizer pressure control(P-ref)setpoint reduced to 2100 psig.
SUP 90. 4 Salem Unit 2 Rev. 2
ENVIRONMENTAL CONDITIONS 5.1 Atmospheric steam dump may be required during the performance of this procedure.
6.0 ACCEPTANCE CRITERIA 6.1 Sufficient natural circulation can be maintained in the active primary loops to maintain stable temperatures following partial loss of heat sink.
6.2 Natural Ci~culation can be restored to inactive loops when the associated Steam Generators are returned .to service.
6.3 The posted maintenance criteria established in SUP 90.0, para 9.1.4 are maintained throughout this test .
SUP 90.4 Rev. 2 Salem Unit 2 -s-
SPECIAL TEST EQUIPMENT i'
'* 7.1 Three Brush 260 (or equivalent) chart recorders, connected per section 8.0 Recorder No. Cal. Date 1
2 3
7.2 Westinghouse reactivity computer ~
Recorder #1 Recorder #2 Recorder #3 Recorder #4
.Recorder #5 X-Y plotter SUP 90.4 Salem Unit 2 Rev. 2
f
\
- DATA COLLECTION 8.1 All data acquired as a result of performance of this procedure shall be recorded at the app~opriate step, or attached data sheets, or affixed as appropriate.
8.2 Brush recorder data point. Mark ea.ch chart with test No. , Date/Time, Recorder Number, Chart Speed. Mark portions of the traces with the step no. to which they are associated, as the test progresses.
8.2.1 Recorder No.* 1 Inst. Parameter Range Channel No. 1 FT-414 RCS Loop Flow 21 0-10%
Channel No. 2 FT-424 RCS Loop Flow 22 0-10%
Channel No. 3 FT-434 RCS Loop Flow 23 0-10%
Channel No. 4 FT-444 RCS Loop Flow 24 0-10%
Channel No. 5 PT-474 Pressurizer Pressure 1600-2400 psig Channel No. 6 LT-461 Pressurizer Level 0-100%
8.2.2 Recorder No. 2 Inst. Parameter Range Channel No. 1 FA-1087 Aux. Feedwater Flow 0-300 gpm to S/G 21 Channel No. 2 LT-517 S/G 21 Level 0-10%
Channel No. 3 PT-516 S/G 21 Pressure 700-1200 psig Channel No. 4 FA-1091 Aux. Feedwater Flow 0-300 gpm to S/G 22 Channel No. 5 LT-527 S/G 22 Level 0-70%
Channel No. 6 PT-526 S/G 22 Pressure 800-1200 psig 8.2.3 Recorder No. 3 Inst. Parameter Range Channel No. l FA-1095 Aux. Feedwater Flow 0-300 gpm to S/G 23 Channel No. 2 LT-537 S/G Level 0-100%
Channel No. 3 PT-536 S/G 23 Pressure 700-1200 psig Channel No. 4 FA-1097 Aux. Feedwater Flow 0-300 gpm to S/G 24 Channel No. 5 LT-547 S/G 24 Level 0-100%
Channel No. 6 PT-546 S/G 24 Pressure 700-1200 psig 8.3 Reactivity Computer Chart Recorders 8.3.l Recorder #1 Channel A P-Computer Output Channel B N-44 excore detector current Channel A Loop 21 Tc TE-413B 510-610°F Channel B Loop 21 Th TE-413A 510-610°F Channel A Loop 22 Tc TE-423B 510-610°F Channel B Loop 22 Th TE-423A 510-610°F Channel A Loop 23 Tc TE-433B 510-610°F Channel B Loop 23 Th TE-433A 510-610°F Salem Unit 2 SUP 90.4 Rev. 2
B.3.5 Recorder tS Channel A Loop 24 Tc TE-443B 510-610°F Channel B Loop 24 Th TE-443A 510-610°F B.3.6 X-Y plotter X - input connected to loop 21 wide-range
. Tc (TE-413B)
Y - input connected to p - computer output.
B. 4 Copies of the reactivity computer trace .and saturation meter recorder will be marked and attached as data.
8.5 P-250 trend typewriter data covering the duration of this test will be attached.
(See Appendix A for data points) 8.6 P-250 computer printouts of the incore thermocouple maps taken during the per-formance Qf the test will be attached.
8.7 P-250 computer printouts of.the single pass partial core maps used during the test for core power determination will be attached as data.
8.8 A record of licensed operators participating and observing this test is attached as Appendix B.
8.9 Data acquisition steps need not be re-performed for multiple test performances done for training purposes. Place NA on the initial lines for these steps.
However, flux map and incore T/C map printouts shall _be taken during training runs, and shall be marked as training runs. It is recommended that the te.st engineer leave all other data acquisition systems (e.g. reactivity computer recorder) operative during the training runs as well
- SUP 90.4 Salem Unit 2 -B- Rev. 2
PRECAUTIONS 9.1 *Observe the precautions, limitations, and special operator instructions given in SUP-90.0, sections* 9.1.4, and 9.4 (ref. 2.1) 9.2 Do not exceed a primary to secondary differential pressure of 1600 psi *.
9.3 Maintain lithium concentration in the RCS at the high end of the allowable range (2.0 - 2.2 ppm).
9.4 Avoid sudden changes in Auxiliary Feed Flow to operating Steam Generators.
9.5 If plant parameters fail to stabilize or if responses exceed predictions
~ubstantially, terminate the test.
9.6 Have Auxiliary Spray in service prior to tripping RCP's. Spray flow can be.
controlled with the spray Vqlve and/or by adjusting charging flow control.
9.7 Caution should be exercised in maintaining the desired power level due to flux shadowing of the excore detectors by the decreased T . The expected magnitude c
of this effect is an approximate 1% decrease in indicated flux per 0 c drop in Tc.
9.8 It is expected that polarity changes in moderator temperature coefficient as temperature is reduced will be observed isothermal temperature coe-ficient, however is expected to remain negative.
9.9 Do not allow Tavg to be reduced below 485°F.
9.10 Control bank D shall be inserted no deeper than 100 step withdrawn. Maintain rod control in "D Bank Select" 9.11 Do not restart RCP's unless the reactor is shutdown. For the purpose of this procedure, shutdown is defined as control bank D at zero steps.
SUP 90.4 Salem Unit 2 Rev. 2
- *o INSTRUCTIONS 10.1 Cooldown NOTE:
The pressure in the steam generator isolated in this test will rise to saturation pressure for TH existing at that time. For this reason, plant conditions must be adjusted so that T av is about 515°F.
10.1.l Start the brush recorders on slow speed, noting date, time, recorder no., parameter range, test no., and run no. use slow chart speed
( 5 nun/min)
- 10.1. 2 . Start the P-250 digital trend recording parameters listed in Appendix A. Start the reactivity chart recorders, including the X-Y plotter.
10.1.3 Initiate a cooldown by increasing the rate of steam dump to obtain a cooldown rate of about 30°F/hour.
CAUTION:
Avoid sudden changes in Auxiliary Feed Flow rate or Steam Generator level.
NOTE:
Use control rods as necessary to maintain core power approximately constant. If boron addition becomes necessary to avoid reaching the rod .insertion to 100 steps, use spray to keep the pressurizer boron con-centration within 20 ppm of RCS concentration.
10.1.4 Upon reaching a Tav of 515°F, terminate the cooldown and allow the RCS to come to an equilibrium condition. Adjust Auxiliary Feed Flow to
.maintain S/G levels at about 33%.
10 .1. 5 Place pressurizer level control in manu~l and increase level and main-tain epproximately 26%.
10.1. 6 Increase reactor power to approximately 1%. use the single pass flux map procedure, AT indication and primary calorimetrics in addition to NI's to determine core power level. Note precaution 9.7.
10.1. 7 Perform primary calorimetric using data sheet il from SUP 90.0 and calibrate power range NI's to reflect the calculated value, if deemed necessary by the T/E.
Salem Unit 2 SUP 90. 4 Rev. 2
- 10.2 Establish Natural Circulation 10.2.l Place pressurizer heaters in manual, off. Establish Auxiliary Spray flow to the pressurizer, and manually maintain pressure at about 2000 psig, using heaters and spray.
NOTE:
As natural circulation is established, pressurizer level will be allowed to rise as Tavg increases to maintain constant RCS water mass. Pressurizer level is expected to rise to approximately 35%.
10.2.2 Simultaneously trip all Reactor Coolant Pumps.
10.2'.3 *Adjust the setpoint of the steam pressure regulator for the steam dump controller to maintain steam pressure at about 765 psig.
10.2.4 Adjust the setpoints on all four atmospheric relief valves, 21-24 MSlO's, to maintain steam pressure below 1025 psig when the Steam Generator is isolated.
10.3 Steam Generator Isolation 10.3.l Isolate Steam Generator #21 by shutting 21MS167, and securing Auxiliary Feed Flow by shutting 21AF21.
CAUTION:
Do not exceed primary.to secondary differential pressure of 1600 psi.
10.3.2 Isolate blowdown on S/G 21 by shutting 21GB4.
10.3.3 Re-establish equilibrium conditions, adjusting the feed flow to the remaining three S/G's so that their levels are held at about 33%.
CAUTION:
AvoiQ sudden changes in Auxiliary Feed Flow to operating Steam Generators.
10.3.4 When Natural Circulation has stopped in loop 21, verify that conditions have stabilized in the other three loops. The following parameter responses are expected.
- TH in all loops increase about 4°f above 4 loop temperature.
TC in loop 21 increase to ~
Pressurizer level will increase about 3%
Pressurizer pressure increase slightly, due to level increase Incore T/C's will increase about* 5°f 21 S/G steam pressure will increase, to as_ high as 1020 psig SuP 90.4 Rev. 2 Salem Unit 2 CAUTION:
If plant parameters fail to stabilize, (this should take at least 30 minutes) or if the response exceeds predictions significantly, terminate this test.
Proceed to step 10.3.11.
Record the maximum AT observed in operating loops °F Do I/C T/C map T/E evaluate for sufficient data.
10.3.S Close 22MS167, 22GB4, and 22AF21, isolating No. 22 Stearn Generator.
CAUTION:
Do not exceed a primary to secondary pressure differential of l600 psi. Avoid sudden change in Auxiliary Feed Flow to 23 and 24 Stearn Generators, while maintaining levels at about 33%.
10.3.6 Allow natural circulation conditions to stabilize. When flow has stopped in loop 22, verify that conditions have stabilized in the remaining two loops. The following parameter changes are expected:
TH in all loops increase about 6°F above 3 loop temperature.
Tc in loop 22 will increase to TH Pressurizer level will increase about 5%
Pressurizer pressure will increase slightly Incore ~/C's will increase 6-10°F Record the maximum AT observed in the operating loops °F CAUTION:
Observe Precautions 9.2. Expected AT (as calculated by TH - TC) in operating loops is about 26°F. If parameters fail to stabilize or exceed predictions significantly, terminate the test*.
Proceed to step 10.3.7.
10.3.7 Perform an incore T/C map, and, at the T/E's discretion, a full incore flux map. When the Test Engineer is satisfied that suffi-cient data has been collected, slowly reduce the setpoint on the 22MS10 valve. Begin steaming, and feeding 22 Stearn Generator slowly, reducing Stearn Generator pressure.
10.3.8 When Steam Generator 22 pressure is approximately equal to steam header pressure, open the steam stop bypass valve, 22MS18, and then open 22MSl67. Steam Generator 22 blowdown may be re-established as required by Chemistry.
10.3.9 Close the 22MS10, stopping atmospheric relief.
Salem Unit 2 SUP 90.4 Rev. 2
- NOTE:
This action will cause Steam Generator 23 and 24 to reduce their steam production. Adjust Auxiliary Feed flows to maintain S/G levels at about 33%.
10.3.10 Allow Natural Circulation conditions to stabilize.
10.3.11 Repeat steps 10.3.7 through 10.3.10 for Steam Generator No. 21.
10.3.12 Stop chart recorders and P-250 digital trend recorder, and verify.
that they are all properly labelled per para 8.2.
10.3.13 Insert control Bank D to zero step using manual rod control in Bank D select until the reactor is shutdown.
10.3.14 Restart all four RCP's in accordance with reference 2.5.1, beginning with #23, 21, 22, then 24.
10.3.15 Restore pressurizer pressure control to automatic, with the setpoint for Pref reset to 2235 psig .. Return pressurizer level controls to Auto .
- 10.3.16 Restore to normal the reactor protection system modified per pre-requisites' 3.5, 3.6, and 3.7 unless further testing is required.
In this case, N/A the step and proceed to establish initial condi-tions for the next test.
10.3.17 Record the names of licensed operators (RO's and SRO's) participating in or observing the test in Appendix B, as appropriate.
10.3.18 Retrieve and attach recorder traces, P-250 printouts per paragraph 8.2-8.7 (see also para. 8.9)
- SUP 90.4 Rev. 2 Salem Unit 2 -l.3-
11.0 TEST COMPLETION
- 11. l Comments 11.2 Changes to SPM 11.3 Signature T/E Date s/s Date QA/QC Date STA Date Salem Unit 2 SUP 90.4, Rev. 2
J\,PPENoix A P-250 DIGITAL TREND PARAMETERS PARAMETER COMPUTER .POINT Pressuriz~r Pressure Channel 1 P0480A Pressurizer Level Channel 1 L0480A RCS Loop 21 Hot Leg Temperature T0419A RCS Loop 21 Cold Leg Temperature T0406A RCS Loop 22 Hot Leg Temperature T0439A RCS Loop 22 Cold Leg Temperature T0426A RCS Loop 23 Hot Leg Tempe~ature T0459A RCS Loop 23 Cold Leg Temperature T0446A RCS Loop 24 Hot Leg Temperature T0479A RCS Loop 24 Cold Leg Temperature T0466A Steam Generator 21 Pressure P0400A Generator 21 Narrow Range Level L0400A earn Generator 22 Pressure P0420A Steam Generator 22 Narrow Range Level L0420A Steam Generator 23 Pressure P0440A Steam Generator 23 Narrow Range Level L0440A Steam Generator 24 Pressure P0460A Steam Generator 24 Narrow Range Level L0460A Power Range Channel 1 (Quadrant 1) N0049A Power Range Channel 2 (Quadrant 2) NOOSOA Power Range Channel 3 (Quadrant 3) NOOSlA Power Range Channel 4 (Quadrant 4) N0052A Hottest Incore Thermocouple U0090A )
Pressurizer Surge Line Temperature T0482A NOTE: At the discretion of the Test Engineer, a redundant computer pqint may be substituted where available .
Salem Unit 2 Page 1 of 1 SUP 90.4, Rev. 2
APPENDIX B SRO's Participating In Test SRO's Observing Test
~.
SUP 90.4 Salem Unit 2 Page 1 of 2 Rev. 2
.... I.. * ..!'
APPENDIX B (cont.)
RO's Participating In Test RO's -Observing Test SUP 90.4 Salem Unit 2 Page 2 of 2 Rev. 2