ML20134A675
| ML20134A675 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 01/24/1997 |
| From: | Mitchell T PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9701290039 | |
| Download: ML20134A675 (34) | |
Text
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Perch Bottom Atomic Pow 2r Strtiim v
PECO NUCLEAR n cD - ov m o ov 1848 Lay Road A Unit of PECO Energy Delta. PA 17314-9032 717 456 7014 January 24, 1997 U.S. Nuolear Regulatory Commission Attention Document Control Desk Mail Station P1137 Washington, DC 20556
Subject:
Peach Bottom Atomic Power Station Unit No. 2 Report of Plant Startup Following The Eleventh Refueling Outage Gentlemen:
Enclosed is the Peach Bottom Atomic Power Station Startup Report for Unit No. 2 Cycle 12. The report is submitted pursuant to Unit 2 Technical Requirements Manual Appendix A.
i Sincerely, O
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, Thomas N. Mitchell 4
Vice President, Peach Bottom Atomic Power Station 7hd[ I wH T
TNM/ MEW /
TC/JWH:cah Enclosure oc:
W.T. Henrick, Public Service Electric & Gas RR. Janati, Commonwealth of Pennsylvania W.L Schmidt, USNRC Senior Resident inspector, PBAPS Rt. McLaan, State of Maryland H.J. Miller, Administrator, Region 1, USNRC j
H.C. Schwemm, Atlantic Electric A.F. Kirby, lit, Delmarva Power INPO Records Center l
CCN# 97-14006
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9701290039 970124 i
PDR ADOCK 05000277 i
P PDR
i boc:
MA Alderter SMB 2 5, Peach Bottom Commitment Coord;nator 52A 5. Chesterbrook Correspondence Control Program 618 3, Chesterbrook 4
j J.B. Cotton 53A1 Chesterbrook D. Fetters 63C 1, Chesterbrook G.D. Edwards A4-1S, Peach Bottom A.A. FuMo SMB 4-5, Peach Bottom R.L Gambone A41S, Peach Bottom J
J.W. Holley SMB 2-4, Peach Bottom i
GA Hunger 62A-1, Chesterbrook C.J. McDermott S131 Main Office M.P. Gallahger SMB 4-2 Peach Bottom M.T. Chokran SMB 24, Peach Bottorn M.E. Warner SMB 3-2A, Peach Bottom PB Nuclear Records SMB 14, Peach Bottom J.T. Robb 610-1, Chesterbrook O.M. Smith 63C 3, Chesterbrook G.J. Lengyel A4-1S, Peach Bottom l
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i MV PECO ENERGY i
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PEACH BOTTOM ATOMIC POWER STATION CYCLE 12 STARTUP REPORT UNIT 2 i
9 SUBMITTED TO THE U.S. NUCLEAR REGULATORY COMMISSION 2
PURSUANT TO FACILITY OPERATING DPR-44 4
JANUARY 1997 I
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- TABLE OF CONTENTS 4
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1.0 Introduction....................................
Page 1 d
2.0 Summary of Test objectives, Descriptions, Acceptance Criteria, and Results i
2.1 Chemical and Radiochemical.....................
3 2.2 Radiation Measurements.........................
5 2.3 Fuel Loading..................................
6 2.4 Shutdown Margin...............................
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2.5 Control Rod Drives.............................
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2.6 Control Rod Sequence...........................
j 2.7 Rod Pattern Exchange...........................
11 2.8 SRM Performance................................
12 13 2.9 IRM Performance................................
2.10 LPRM Calibration...............................
14 1
2.11 APRM Calibration..............................
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Process Computer..............................
16 2.12 j
2.13 Reactor Core Isolation Cooling (RCIC) System... 17 2.14 High Pressure Coolant Injection (HPCI) System.
18 2.15 Selected Process Temperatures..................
19 20 2.16 System Expansion...............................
2.17 Core Power Distribution........................
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22 2.18 Core Performance...............................
5 2.19 Feedwater System..............................
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24 2.20 Bypass Valves..................................
2.21 Main Steam Isolation Valves....................
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2.22 Relief Valves..................................
2.23 Turbine Stop and Control Valve Trips...........
27 28 2.24 Flow Control...................................
29 2.25 Recirculation System...........................
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Page 1 INTRODUCTION PBAPS Unit 2 Technical Requirements Manual Appendix A requires submittal of a Startup Report following an outage in which fuel of a different design was installed.
This report summarizes the plant startup and power ascension testing performed to ensure that no operating conditions or system characteristic changes occurred during the eleventh refueling outage of Unit 2 which diminished the safe operation of the plant.
Startup testing was performed in accordance with the Updated Final Safety Analysis Report (UFSAR) section 13.5 "Startup and Power Test Program".
This report will address each of the applicable tests identified in UFSAR section 13.5.2.2.
UFSAR tests that were only required to be performed during the initial plant startup (Cycle 1) are not included in this report.
A description of the measured values of the operating conditions or characteristics obtained during startup testing and a comparison of these values with design predictions and specifications will also be included in this report.
' Level 1 and Level 2 test acceptance criteria are described in UFSAR section 13.5.2.1.
For each applicable test identified in UFSAR section 13.5.5.2, all Level 1 criteria were met, and all Level 2 criteria were either met, or discrepancies were investigated and determined to have no effect on safety, reliability, operability, and pressure integrity of the systems tested.
Any corrective actions that were required to obtain satisfactory operation will also be described.
Peach Bottom Unit 2 was out of service from 9-13-96 to 10-03-96 to accommodate its eleventh refueling outage.
During this 19 day outage, 284 new GE13 fuel bundles were loaded into the core, with the balance of the core load being comprised of once and twice burned Gell fuel bundlcs. The Cycle 12 core consists entirely of barrier fuel.
This is the first application of the GE13 product line at PBAPS.
The GE13 fuel type has been approved for use by the NRC, and incorporates only minor evolutionary changes to the fuel types previously used at PBAPS. GE13 fuel is mechanically, neutronically, and thermal-hydraulically compatible with the co-resident fuel, RPV internals, spent fuel pool internals, refueling equipment, and other interfacing plant systems. GE13 fuel complies with all required fuel design and licensing bases during steady-state, transient, and accident conditions.
Page 2 The primary design differences between the GE13 and Gell designs are as follows:
- Improved critical power performance and cycle economics
- GE13 part length rods are 12 in. longer than Gell i
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- GE13 has one more fuel pin spacer than Gell
- A GE13 bundle has a mass approximately 2 Kg more than GEli Both Gell and GE13 fuel designs have a 9 x 9 rod array with two large central water rods and an active fuel length of 146 inches.
The GE13 fuel product line has a different Safety Limit Minimum Critical Power Ratio (SLMCPR) value than the fuel designs previously utilized at PBAPS. The new SLMCPR values are 1.09 for operation with two recirculation loops in service and 1.11 for t
single loop operation. LCR 96-01 was submitted to update Unit 2 Technical Specification Section 2.1.1.2 with the GE13 SLMCPR values. This License Change Request was approved by the NRC, and was effective prior to Cycle 12 Startup.
Other in-vessel maintenance performed during the outage included:
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- Replacement of 19 control rod drives
- Replacement of 7 LPRM strings Unit 2 returned to service on 10-03-96 and reached steady-state full power for the first time in Cycle 12 on 10-25-96.
Startup testing was completed on 11-01-96.
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The successfully implemented startup test program ensures that the eleventh refueling outage of Unit 2 has resulted in no conditions or system characteristics that in any way diminish the i
safe operation of the plant.
All tests and data referenced in this report are on file at Peach Bottom Atomic Power Station.
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Page 3 2,1 Chemical and Radiochemical Objectives Chemical and radiochemical analyses were performed in accordance with UFSAR section 13.5.2.2.(1).
The objectives of these analyses were: (1) to maintain control of and knowledge about the reactor water chemistry, and (2) to determine that the sampling equipment, procedures, and analytic techniques are adequate to demonstrate that the coolant chemistry meets water quality specifications and process requirements.
In addition, this testing also allowed evaluations to be made of fuel performance, filter demineralizer operation, condenser integrity, offgas system operation, and calibration of certain process instruments.
Description During the refueling outage and subsequent startup and power ascension, samples were taken and measurements were made to determine the chemical and radiochemical quality of the reactor water, feedwater, amount of radiolytic gas in the steam, gaseous activities leaving the air ejectors, delay times in the offgas lines, and performance of filters and demineralizers.
Calibrations were also made of monitors in the stack, liquid waste system, and liquid process lines.
Acceptance Criteria Water quality must be known and must conform to the water quality specifications at all times.
The activities of gaseous and liquid effluents must be known and must conform to license limitations.
Chemical factors defined in the Technical Specifications must be maintained within those limits specified.
Results Prior to and during core alterations, chemistry values were verified to be within daily limits per CH-10 " Chemistry Goals".
Prior to startup, chemistry requirements were verified by RT-C-095-886-2 " Chemistry Preparation for Reactor Startup" on 10-06-96.
The Shift Chemist also verified that reactor water dose equivalent I-131, chloride concentration, and sulfate concentration were within specification per CH-10.
During power ascension, coolant chemistry was verified to meet water quality specifications and process requirements by ST-C-095-824-2 " Reactor Startup Chemistry With Steaming Rates Less Than 100,000 Lbs/Hr",
performed on 10-01-96.
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At high steaming rates, ST-C-095-823-2 " Conductivity and Chloride Ion Content in Primary Coolant During Normal Operation" was performed at least every 4 days after reaching 850 psig reactor This test verified that the conductivity was less than pressure.
or equal to 5 umhos/cm and the chloride concentration was less than or equal to 200 ppb in all samp1's.
q Gaseous and liquid effluent activities were checked by Chemistry Department surveillance tests and round sheets.
The chemistry values required by the Technical Specifications were checked l
daily in accordance with CH-10 and were verified to be within the specified limits.
Gasecus and particulate release dose rates i
from the main stack and roof vents were checked weekly in accordance with ST-C-095-857-2, ST-C-095-859-2, and ST-C-095-860-2.
7 Condensate filter demineralizers were backwashed and precoated based on Chemistry recommendations.
I The offgas system was placed in service on 10-03-96.
The steam jet air ejector discharge activity indicated that Unit 2 was started up with no fuel failures.
Subsequent analysis of chemistry samples using a fuel reliability code confirmed that no fuel failures exist.
Radiation monitors and chemistry sampling equipment were also calibrated during power ascension for the main offgas stack, j
liquid waste system, and liquid process lines.
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Pcga 5 2.2 Radiation Measurements Objectives Radiation measurements were performed in accordance with UFSAR section 13.5.2.2.(2).
The objectives of these measurements were to determine the background gamma and neutron radiation levels in the plant and to monitor radiation levels during power ascension to assure protection of personnel and continuous compliance with j
10CFR20 requirements.
Description
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l A survey of natural background radiation throughout the plant site will be made.
During the refueling outage, startup, and power ascension, gamma radiation measurements and neutron dose rate measurements (where appropriate) will be made at significant locations throughout the plant.
All potentially high radiation areas will be surveyed.
3 Acceptance Criteria The radiation doses of plant origin and occupancy times shall be j
controlled consistent with the guidelines of the standards for protection against radiation outlined in 10CFR20 NRC General Design Criteria, i
Results Routine surveys were performed throughout the protected area in i
accordance with HP-C-200 " Routine Survey Program" to determine l
background radiation levels and assure personnel safety.
The initial survey of the drywell was performed per HP-315 on 3
1 9-13-96.
During the refueling outage and subsequent plant startup, appropriate radiation surveys were performed to generate Radiation Work Permits per HP-C-310 and properly post plant i
radiation areas per HP-C-215 to maintain compliance with 10CFR20 1
requirements.
During the refueling outage, several plant areas were
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continuously manned by Health Physics Personnel.
These areas included the Refuel Floor, Drywell Access, and Personnel Access 9
areas.
During the refueling outage, workers received 132 person-rem of exposure.
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i 2.3 Fuel Loadina l
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Objective Fuel loading was performed in accordance with UFSAR section i
13.5.2.2(3).
The objective was to load new fuel and shuffle the existing fuel safely and efficiently to the final loading i.
. pattern.
Description During fuel movement activities, all control rods must be fully 4
inserted.
At least 2 SRMs must be operable, one in the quadrant i
that fuel movement is being performed in, and one in an adjacent j
quadrant.
Each fuel bundle must remain neutronically coupled to an operable SRM at all times.
SRM count rates will be recorded a
before and after each core component move.
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Each control rod will'be functionally tested by being completely l
withdrawn and reinserted.
A subcriticality check will be performed by verifying that the core remains subcritical when any single rod is fully withdrawn and all other rods are fully j
inserted.
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Acceptance criteria f
The core is fully leaded in its final' loading pattern and the core shutdown margin demonstration has been completed.
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Results
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The fuel shuffle was performed in accordance with FH-6C " Core Component Movement - Core Transfers" and was completed on l
l 09-27-96.
The final loading pattern includes 284 new GE13 fuel bundles, 272 once-burned Gell bundles, and 208 twice-burned Gell bundles. The complete Cycle 12 core consists of barrier fuel.
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Fuel bundle serial numbers, core locations, orientations, and seating positions were verified in accordance with M-C-797-020
" Core Verification", completed on 09-27-96.
l Each control rod was withdrawn and inserted to verify coupling i
integrity, position indication, proper rod withdrawal and insertion speeds, and core subcriticality.
This test data is documented in ST-O-003-465-2 " Control Rod Withdraw Tests",
completed on 09-30-96, i
l The acceptance criteria for this test was met when the actual j
shutdown margin was demonstrated with a fully loaded core in accordance with ST-R-002-910-2, performed on 10-01-96.
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1 l-Page 7 2.4 Shutdown Marain l.
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l Objective a'
Core shutdown margin was demonstrated in accordance with UFSAR section 13.5.2.2.(4).
The objective of this test is to demonstrate that the reactor will be subcritical throughout the i
fuel cycle with any single control rod fully withdrawn.
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f Description i
Core shutdown margin was demonstrated with the "In-Sequence Critical" method.
At criticality, correction factors were applied for moderator temperature, reactor period, worth of the
" strongest" rod, and the "R" value for the cycle.
Acceptance Criteria The fully loaded core must be subcritical by at least 0.38%
delta K/K throughout the fuel cycle with any single control rod fully withdrawn.
Results Core shutdown margin was demonstrated by performing ST-R-002-910-2 " Shutdown Margin" on 10-01-96.
Control rods were withdrawn according to the startup sequence.
SRM count rates were recorded after each control rod withdrawal.
The reactor was declared critical at 0326 on 10-01-96 with RWM group 2 control rod 42-47 at position 22.
Reactor water temperature was 195 degrees F, count rate doubling time was 408 seconds, and the calculated reactor period was 588 seconds.
The BOC SDM value was calculated by subtracting the worth of the analytically determined strongest rod from the worth of all withdrawn rods and then applying the temperature and period correction factors.
This calculated SDM value was equal to 1.45%
delta K/K.
This value was verified to be greater than (.38%
delta K/K + R), which is (.38% + 0.00%) delta K/K or 0.38% delta K/K. R is O since this core is at its most reactive point at BOC.
To allow a minimum reactor water temperature of 38 degrees F throughout Cycle 12, a SDM adder of 0.16% delta K/K was applied; therefore, the SDM value for reactor temperatures down to 38 is (1.45 - 0.16)%, or 1.29% delta K/K.
The difference degrees F.
between the predicted and actual SDM values was (1.45 - 1.33) %,
or 0.12% delta K/K.
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i 2.5 Control Rod Drives Objectives 4
Control rod drive testing was performed in accordance with UFSAR section 13.5.2.2.(5).
The objectives of this testing were to J
demonstrate that the CRD system operates properly over the full range of primary coolant temperatures and pressures and that thermal expansion of core components does not bind or i
significantly slow the control rod movements.
f Description The CRD system was tested at rated reactor pressure to verify that there was no significant binding caused by thermal expansion of core components.
The withdraw and insert speeds were checked for each control rod, and each rod was individually scram-timed at rated reactor pressure.
d Acceptance criteria i
Each CRD must have a normal insert or withdraw speed of 3.0 +/-
0.6 in/sec (7.62 +/- 1.52 cm/sec), indicated by a full 12 foot stroke in 40 to 60 seconds.
Upon scramming, the average of the insertion times of all operable control rods, exclusive of circuit response times, must be no greater than:
a Percent FSAR Insertion T.S.
Adjusted Inserted Time (sec)
Insertion Time (sec) 5 0.375
.44 to pos 46 20 0.900 1.08 to pos 36 50 2.000 1.83 to pos 26 90 5.000 3.35 to pos 06 1
Note: Scram time is measured from time pilot scram valve solenoids are de-energized.
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ameults Each CRD had its normal insert speeds, withdraw speeds, and
" Control Rod coupling integrity checked by ST-O-003-465-2All insert and withdraw 09-30-96.
Withdraw Tests", completed on speeds fell within the acceptance criteria of 45-51 sec/ full or an Action Request was generated to investigate the l
- stroke, This test also checked CRD stall flows and rod position problem.
indication, and verified core suberiticality.
I Prior to exceeding 40% power during the BOC startup, each CRD was l
"CRD Scram scram timed in accordance with ST-R-003-460-2 j
Insertion Timing, Full In and Full Out Position Indication Check, l
and Rod Coupling Integrity Check for All Operable Control Rods",
j Five rods were initially declared " slow",
completed on 10-04-96.
but subsequently had HCU maintenance performed and were retested l
satisfactorily. All 185 rods had satisfactory scram times prior i
to exceeding 40% power.
During power ascension, ST-0-003-470-2 "CRD Coupling Integrity l
Test" was performed to verify coupling integrity, full-out j
position indication, and neutron response for each control rod.
l This test was completed on 10-22-96.
During power ascension, when reactor power was above the RWM LPSP J
(approximately 20%), ST-0-003-560-2 " Control Rod Exercise" was j
This test required each fully withdrawn rod to performed weekly.
j be inserted and withdrawn one notch.
In addition, ST-0-003-561-2 " Control Rod Exercise - All Rods" was j
l performed monthly, and required every control rod to be exercised one notch.
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2.6 Control Rod Secuence 1
Objectives a
I control rod sequence testing was performed in accordance with UFSAR section 13.5.2.2(6).
The objectives of this testing were to achieve criticality in a safe and efficient manner using the approved rod withdrawal sequence, and to determine the effect on reactor power of control rod notion at various operating 2
j conditions.
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Description s
The approved rod withdrawal sequence used for startup implemented l
the BPWS (Banked Position Withdrawal Sequence) methodology with I
the A2 sequence control rods.
This sequence is contained in GP-2-2 Appendix 1 (Startup Rod Withdrawal Sequence Instructions),
i which is used by Operations personnel when rod movement is enforced by the RWM.
l At power levels below the RWM LPSP, the RWM will prevent an out of sequence rod withdrawal and will not allow more then two rods i
to be inserted out of sequence.
The GP-2-2 Appendix 1 sequence is programmed into the RWM and is designated as "Startup 3".
This sequence specifies rod withdrawal from the all-rods-in condition to the rod pattern in which all A2 rods are fully inserted and all other rods are fully withdrawn.
Rod withdrawals l
beyond this pattern are governed by RE-31 " Reactor Engineering l
Core Monitoring Instructions".
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j Results j
Cold criticality was achieved on 10-01-96 by withdrawing rods in j
accordance with GP-2-2 Appendix 1.
This same sequence (Startup i
- 1) had previously been verified in the RWd in accordance with ST-R-62A-220-2 "RWM Sequence Verification, performed on 09-25-96.
Prior to withdrawing the first rod, ST-O-62A-210-2 i
"RWM Operability Check" was performed on 2.0-01-96.
Criticality 1
occurred on sequence step 37 in RWM group 2.
The critical rod 4
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pattern is recorded in GP-2-2 Appendix 1 and ST-R-002-910-2 l
" Shutdown Margin".
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2.7 Rod Pattern Exchance Objective l
A rod pattern exchange was performed in accordance with UFSAR section 13.5.2.2.(7).
The objective was to perform a representative change in basic rod pattern at a reasonably high reactor power level.
Description The control rod pattern was adjusted by rod withdrawals in a planned sequence in order to ultimately achieve the full power target rod pattern.
Acceptance Criteria The achievement of the final target rod pattern by the use of the intermediate rod patterns while staying within licensed core limits meets the requirements of this test.
Results Due to various equipment problems encountered during the startup (resulting in two SCRAMS and a power reduction to BPV capability i
to remove the generator from service), several intermediate rod patterns were developed and attained prior to achieving the target rod pattern. On 10-22-96, a load drop to 60% power was performed to set the final target rod pattern. Full power equilibrium conditions in the target rod pattern were achieved on I
10-25-96.
During the numerous control rod movements performed during the startup, no thermal limit violations occurred.
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2.8 SRM Performance l
objective SRM performance was monitored in accordance with UFSAR section 13.5.2.2.(8).
The objective was to demonstrate that SRM instrumentation provided adequate information to the operator during startup.
Description Source Range Monitor count rate data was taken during rod withdrawals to criticality and was compared with stated operability criteria.
Acceptance criteria There must be a neutron signal-to-noise ratio of at least 2 to 1 on the required operable SRMs, and a minimum count rate of 3 counts per second on the required operable SRMs.
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Results SRM operability was verified daily during the outage by I
performing ST-O-60D-250-2 "SRM Operability and Neutron Response Check".
Prior to startup, SRM performance was verified by SI2N-60D-SRM-A2CZ "SRM Channel A Calibration / Functional Check" and SI2N-60D-SRM-B2CZ "SRM Channel B Calibration / Functional t
Check".
Minimum SRM count rate was determined to be greater than 3 CPS prior to control rod withdrawal on 10-01-96.
The signal-to-noise ratio check is only required to be performed in accordance with Tech Specs if the SRM count rate is less than 3.0 CPS.
Since the i
SRM count rate was never less than 3.0 CPS at any time during the I
startup, this verification was not performed.
During startup, SRM operability was verified in accordance with GP-2 " Normal Plant Startup".
All 4 SRMs were operable for the initial BOC startup.
SRM count rate data following each rod withdrawal to criticality was recorded in ST-R-002-910-2.
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Paga 13 2.9 IRM Performance objective IRM performance was monitored in accordance with UFSAR section 13.5.2.2.(9).
The objective was to adjust the IRMs to obtain a optimum overlap with the SRMs and APRMs.
Description 4
IRM calibration and functional checks were performed to ensure
'l adequate overlap with the SRMs and APRMs.
In addition, IRM response was monitored during startup in accordance with GP-2 to assure that the IRMs were properly indicating the increasing neutron flux levels during the power ascension.
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Acceptance criteria Each IRM channel must be adjusted so the overlap with the SRMs i
and APRMs is assured.
The IRMs must produce a scram signal at J
120 on a full scale of 125.
i Results Prior to startup, IRM performance was tested and the scram setpoints were verified by performing SI2N-60C-IRM-A(B)4FW i
" Intermediate Range Monitor Channel A(B) Functional Check", on i
09-27-96 and 10-06-96.
All 8 IRMs were operable for the BOC12 j
startup.
During startup, SRM/IRM overlap was verified in accordance with ST-O-060-240-2 on 10/01/96, and all IRMs were verified to have on-scale increasing indication prior to switching to Range 4 on any IRM.
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In addition, proper IRM response to power increases was verified e
in accordance with GP-2 during power ascension.
f Prior to withdrawing the IRMs, all APRM downscale lights were verified to be cleared prior to exceeding the scram setpoint of 120/125 IRM scale.
This verified proper IRM/APRM overlap.
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Page 14 2.10 LPRM Calibration Objective To calibrate the Local Power Range Monitor (LPRM) system in accordance with UFSAR section 13.5.2.2.(10).
l Description The LPRM channels were calibrated to make the LPRM readings proportional to the neutron flux in the narrow-narrow water gap at the LPRM detector elevation.
Calibration and gain adjustment information was obtained by using the 3D Monicore System to relate the LPRM reading to the average fuel assembly power at the detector location.
Acceptance Criteria With the reactor in the rod pattern and at the power level which the calibration is to be performed, the LPRM meter readings will be proportional to the average flux in the four adjacent fuel assemblies at the LPRM detector elevation.
Results ST-R-60A-230-2 "LPRM Gain Calibration" was performed on 10-26-96 at 100% power.
The Gain Adjustment Factor (GAF) acceptance criteria in the test ensured that the LPRM detectors were adjusted to be proportional to the neutron flux at the detector locations.
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2.11 APHIE enlibration l
Obj ective I
To calibrate the Average Power Range Monitor (APRM) system in accordance with UFSAR section 13.S.2.2.(11).
i Description i
During power ascension, the APRM channel readings were adjusted to be consistent with core thermal power as determined from the Plant Monitoring System heat balance.
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Acceptance criteria l
The APRM channels must be calibrated to read within plus or minus 2% of the actual core thermal power.
s Raoults l
Prior to startup, the following tests were verified to be within 1
surveillance per GP-2 on 10-01-96:
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- SI2N-60A-APRM-A1CM(thru FlCM) " Average Power Range Monitor Calibration / Functional Check"
- SI2N-60A-APRM-A(B)3FW " Average Power Range Monitor Channel i
l A(B) Functional Check" t
Numerous APRM calibrations were performed in accordance with ST-0-60A-210-2 "APRM System Calibration During Two Loop Operation" throughout power ascension.
The first APRM gain calibration was performed on 10-03-96 at 7.3% power and the last 4
APRM gain calibration was performed on 10-23-96 at 100% power.
the APRMs were inadvertently miscalibrated 3.5%
l On 10-07-96, non-conservatively for approximately 6.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br /> when the heat l
balance failed and inappropriate actions were taken that resulted in setting the APRMs to an inaccurate heat balance value.
I With the exception of the above event, the APRMs were calibrated to within plus or minus 2% of core thermal power during the power l
l ascension.
l All 6 APRMs were operable for the initial BOC startup.
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2.12 Process Computer j
Objective The Plant Monitoring System (PMS) and 3D Monicore System were
' tested in accordance with USFAR section 13.5.2.2.(12).
The 4
j objective 'was to verify the performance of the these systems under operating conditions.
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l Description During power ascension, the PMS provided NSSS and BOP process variable information to the operator.
3D Monicore provided core monitoring and predictor capabilities. The NSSS heat balance was verified to be correct and the BOC NSSS databank was installed and verified to be correct.
Acceptance criteria The PMS and 3D Monicore systems will be considered operational when plant sensor information is processed accurately, resulting in a correct thermal heat balance and core power distrihution.
The calculations shall be independently evaluated by ti,2 use of an offline core physics code.
Results The BOC12 databank was installed and verified in accordance with RE-38 "NSSS Software BOC Databank Update", performed on 09-22-96.
During power ascension, the core heat balance was verified to be correct by performing RT-R-59C-500-2 " Checkout of the NSSS computer Calculation of Core Thermal Power" at approximately 100%
power on 11-01-96.
Thermal limit and power distribution results were also independently evaluated by Fuels & Services Division (FSD) using their offline PANACEA code.
Good agreement was observed between 3D Monicore and PANACEA results.
In addition, a Modification. Acceptance Test (MAT P00068B-2) was performed on 10-05-96 to verify the 3D Monicore system was accurately processing information from the upgraded TIP system.
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Page 17 2.13 RCIC System Objective i
j Reactor Core Isolation Cooling (RCIC) system testing was l
performed in accordance with UFSAR section 13.5.2.2.(13).
The objective was to verify RCIC operation at various reactor i
pressures during the power ascension.
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3 Description A controlled start of the RCIC system will be done at a reactor pressure of approximately 150 psig and a quick start will be done at a reactor pressure of 1000 psig.
Proper operation of the RCIC system will be verified and the time required to reach rated flow i
will be determined.
These tests will be performed with the f
i system in test mode so that discharge flow will not be routed to j
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Acceptance Criteria 1
The RCIC system must have the capability to deliver rated flow j
(600 gpm) in less than or equal to the rated actuation t.me (30 i
seconds) against rated reactor pressure.
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Results l
A controlled start was performed at 175 psig reactor pressure in j
accordance with ST-o-013-200-2 on 10-01-96.
A cold quick start at rated reactor pressure was performed on 10-03-96.
The RCIC 'arbine did not trip off during the testing and rated flow was achieved in less than 30 seconds.
Page 18 2.14 HPCI System Objective High Pressure Coolant Injection (HPCI) system testing was performed in accordance with UFSAR section 13.5.2.2.(14).
The objective was to verify proper operation of the HPCI system throughout the range of reactor pressure conditions.
Description Controlled starts of the HPCI system will be performed at reactor pressures near 150 psig and 1000 psig, and a quick start will be initiated at rated pressure.
Proper operation of the HPCI system will be verified, the time required to reach rated flow will be determined, and any adjustments to the HPCI flow controller and HPCI turbine overspeed trip will be made.
These tests will be performed with the system in test mode so that discharge flow will not be routed to the reactor pressure vessel.
Acceptance Criteria The time from actuating signal to required flow must be less than 30 seconds with reactor pressure at 1000 psig.
With HPCI and discharge pressure at 1220 psig, the flow should be at least 5000 gpm.
The HPCI turbine must not trip off during startup.
Results During the outage, the HPCI turbine overspeed test was performed (on aux steam from the boilers) on 09-27-96 in accordance with RT-N-023-240-2.
During the startup, a problem with the HPCI booster pump bearing caused a 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> delay in power ascension.
The booster pump was repaired and a controlled start was performed at 175 psig reactor pressure in accordance with ST-0-023-200-2 on 10-02-96.
A cold quick start at rated pressure was performed in accordance with ST-O-023-301-2 on 10-03-96.
The HPCI turbine did not trip off during testing, and rated flow was achieved within the required time period.
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Paga 19
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2.15 Selected Process Temperatures t
J Objective i
j Selected temperatures were monitored in accordance with UFSAR section 13.5.2.2.(15).
The objective was to ensure that the i
water temperature in the bottom head of the reactor vessel was l
within 145 degrees F of the steam dome saturation pressure prior to starting a second Recirc pump.
i Description The applicable reactor parameters were monitored during the power ascension in order to determine that adequate mixing of the reactor water was occurring in the lower plenum of the pressure vessel.
This was done to ensure that thermal stratification of the reactor water was not occurring.
Acceptance Criteria The second reactor Recirc pump shall not be started unless the coolant temperatures in the upper (steam dome) and lower (bottom head drain) regions of the reactor pressure vessel are within 145 degrees F of each other.
The pump in the idle Recirc loop shall not be started unless the temperature of the coolant within the idle loop is within 50 degrees F of the active Recire loop temperature.
Results No Recirc pump trips occurred during the BOC12 power ascension.
Prior to placing the second Recirc pump in service, all temperature requirements specified in SO 2A.1.B-2 were verified to be met.
Throughout power ascension, whenever a heatup or cooldown of the RPV was in progress, the appropriate temperature readings were recorded in accordance with ST-0-080-500-2
" Recording and Monitoring Reactor Vessel Temperatures and Pressure".
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Page 20 2.16 System Ernansion Objective System expansion inspections were performed in accordance with UFSAR section 13.5.2.2.(16).
The objective was to verify that the reactor drywell piping system is free and unrestrained in regard to thermal expansion and that suspension components are functioning in the specified manner.
Description An inspection of the horizontal and vertical movements of major equipment and piping in the nuclear steam supply system and auxiliary systems will be made to assure components are free to move as designed.
Any adjustments necessary to assure freedom of movement will be made.
Acceptance criteria There shall be no evidence of blocking or the displacement of any system component caused by thermal expansion of the system.
Hangers shall not be bottomed out or have t'.te spring fully stretched.
Results During the refueling outage, snubber inspections were performed 1
in accordance with Tech Specs.
A sample of pipe hangers were inspected in accordance with the ISI program.
During the RPV pressure test, drywell piping was visually inspected at 1000 psi.
No blocking or interference of piping due to thermal expansion was observed.
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Page 21 2.17 Core Power Distribution Objectives Core power distribution testing was performed in accordance with UFSAR section 13.5.2.2.(17).
The objectives were to confirm the reproducibility of the TIP readings, determine the core power distribution in three dimensions, and determine core power symmetry.
Description TIP reproducibility is checked with the plant at steady-state conditions by running several TIP traverses through the same core location (common channel 32-33) with each TIP detector.
The TIP data is then statistically evaluated to determine the extent of deviations between traverses from the same TIP machine.
Core power distribution, including power symmetry, will be determined by running at least two full sets of TIP runs (OD-1s) at steady state conditions, and then statistically evaluating the TIP data from symmetric core locations to determine core power This TIP data will also provide the axial and radial symmetry.
flux distribution for the core.
Acceptance Criteria In the TIP reproducibility test, the TIP traverses shall be reproducible within +/- 3.5% relative error or +/- 0.15 inches (3.8 mm) absolute error at each axial position, whichever is greater.
Results RE-27 " Core Power Symmetry and TIP Reproducibility Test" was performed at 94% power on 10-14-96.
The TIP traverses were.
Total TIP uncertainty reproducible within 3.5% relative error.
was 1.59% which is within the 7.1% acceptance criteria.
The maximum deviation between symmetrically located pairs (pair 40/12) was 9.28%, at node 21.
The axial and ring relative power distributions that were predicted for the short shallow and full power target rod patterns were compared with the actual power distributions after the rod patterns were set.
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2.18 Core Performance e
Y Objectives l
Core performance was monitored in accordance with UFSAR section f
1 i
j 13.5.2.2.(18).
The objectives were to evaluate the core j
performance parameters of the core flow rate, core thermal power, and the core thermal limit values of Minimum Critical Power i
Ratio, Linear Heat Generation Rate, and Average Planar Linear Heat Generation Rate.
j f
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Description j
i Core thermal power, core flow, and thermal limit values were j
determined using the Plant Monitoring System, 3D Monicore system, l
j and other plant instrumentation.
This was determined at various reactor conditions, and methods independent of the Plant Monitoring System were also used.
1 l
Acceptance Criteria Steady state core thermal power shall not exceed 3458 MWth.
The thermal limit values of Maximum Fraction of Limiting Critical j
Power Ratio (MFLCPR), Maximum Fraction of Limiting Power Density (MFLPD), and Maximum Average Planar Ratio (MAPRAT) shall not
{
exceed 1.00.
4 I
Results I
The core thermal limit values were checked at least daily above f
25% power using the 3D Monicore System.
The core thermal power 1
heat balance and core flow values were verified by performing i
i RT-R-59C-500-2 on 11-01-96 and RT-I-002-250-2 " Core Flow j
Verification" on 10-22-96.
i j
Core thermal power, core flow, and thermal limit values did not i
exceed their maximum allowed values at any time during the power ascension.
i f
The proper reactivity behavior of the core as a function of cycle exposure was verified by performing ST-R-002-900-2 " Reactivity j
Anomalies" on 10-14-96.
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Page 23 2.19 Feedwater System Objectives Feedwater system testing was performed in accordance with UFSAR section 13.5.2.2.(22).
The objectives were to demonstrate acceptable reactor water level control, and to evaluate and adjust feedwater controls, as appropriate.
Description Reactor water level setpoint changes of approximately
+/- 6 inches will be used to evaluate and adjust the feedwater control system settings for all power and Feedwater pump modes.
Acceptance Criteria The decay ratio is expected to be less than or equal to 0.25 for each process variable that exhibits oscillatory response to Feedwater system setpoint changes.
System response for large transients should not be unexplainably worse than pre-analysis.
Results 1
RT-O-02B-250-2 " Reactor Water Level Instrument Perturbation Test", a monthly test, was performed satisfactorily during the startup on 10-21-96.
No Feed Pumps ware tripped during the power ascension, so the automatic Recirc runback feature was not observed.
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2.20 Bypass Valves j
i Objectives The main turbine Bypass Valves (BPVs) were tested in accordance with UFSAR section 13.5.2.2.(23).
The objectives were to demonstrate the ability of the pressure regulator to minimize the t
reactor disturbance during a change in reactor steam flow and to i
demonstrate that a bypass valve can be tested for proper functioning at rated power without causing a high flux scram.
Description One of the BPVs will be tripped open by a test switch.
The pressure transient will be measured and evaluated to aid in
)
making adjustments to the pressure regulator.
j Acceptance Criteria l
The decay ratio is expected to be less than or equal to 0.25 for 1
each process variable that exhibits oscillatory response to BPV position changes.
The maximum pressure decrease at the turbine j
inlet should be less than 50 psig to avoid approaching low steam line pressure isolation or cause excessive water level swell in
]
the reactor.
Results Each BPV was operationally tested in accordance with ST-O-001-409-2, performed on 10-14-96.
This is a monthly test that fully s'.rokes all 9 BPVs.
Turbine first stage pressure and reactor water level remained normal during the BPV testing.
During power ascension, the performance of the BPVs were monitored in accordance with GP-2.
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Page 25 2.21 Main Steam Isolation Valves Objectives The MSIVs were tested in accordance with UFSAR section 13.5.2.2.(24).
The objectives were to functionally check the MSIVs for proper operation at selected power levels and to determine isolation valve closure time.
Description i
Functional checks (10% closure) of each isolation valve will be performed at selected power levels.
Each MSIV will be individually closed below 75% power and the closure times will be measured.
a Acceptance Criteria MSIV stroke time will be within 3 and 5 seconds, exclusive of electrical delay time.
During full closure of individual valves, reactor pressure must remain 20 psi.below scram, neutron flux must remain 10% below scram, and steam flow in individual lines must be below the trip point.
ResuTts During the outage, each MSIV was stroked satisfactorily in accordance with ST-M-01A-471-2, performed on 09-26-96.
During the initial startup, each MSIV was opened in accordance with GP-2 and SO 1.A.1.A-2 on 10-01-96.
MSIV individual closure timing and continuity checks are performed monthly per ST-O-07G-470-2 and was performed on 09-27-96.
All MSIVs had a full closure stroke time between 3 and 5 seconds.
Pega 26 2.22 Relief Valves objective Relief valve testing was performed in accordance with UFSAR section 13.5.2.2.(25).
The objectives were to verify the proper operation of the dual purpose relief safety valves, to determine their capacity, and to verify their leaktightness following operation.
Description The Main Steam Relief Valves (MSRVs) will each be opened manually so that at any time only one is open.
Capacity of each relief valve will be determined by the amount the Bypass or Turbine Control Valves close to maintain reactor pressure.
Proper reseating of each relief valve will be verified by observation of temperatures in the relief valve discharge tailpipe.
Acceptance Criteria Each relief valve is expected to have a capacity of at least 800,000 lb/hr at a pressure setting of 1080 psig.
Relief valve leakage must be low enough that the temperature measured by the thermocouples in the discharge side of the valves falls to within 10 degrees F of the temperature recorded before the valve was opened.
Each valve must move from fully closed to fully opened in 0.3 seconds.
Results Each Safety Relief Valve (SRV) was manually cycled in accordance with ST-O-01A-440-2 " Relief Valve Manual Actuation".
This test was performed on 10-01-96.
Each SRV (including the 5 ADS vplves) had a satisfactory closure time.
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Page 27 2.23 Turbine Stoo and Control Valve Trios Objective The Turbine Stop Valve (TSV) and Turbine Control Valve (TCV) trips were tested in accordance with UFSAR section 13.5.2.2.(26).
The objective of this test was to demonstrate the response of the reactor and its control systems to protective trips in the j
turbine and the generator.
Description The TSVs and TCVs will be tripped at a selected recctor power level in order to evaluate the effect on the primary system, pressure control, and the main turbine generator.
Acceptance Criteria The maximum reactor pressure should be less than 1200 psig, 30 psi below the fast safety valve setpoint, during the transient following first closure of the TSVs and TCVs.
Core thermal power must not exceed the safety limit line.
The trip at or below 25%
power must not cause a scram.
Feedwater control adjustments shall prevent low level initiation of the HPCI system and Main Steam isolation as long as feedwater flow remains available.
Results The following tests were performed on 10-03-96 at 17% power:
- ST-O-60F-420-2 " Turbine Control Valve Fast Closure Scram Functional"
- ST-O-001-200-2 " Turbine Main Stop Valve Closure Functional" In addition, the TSVs are tested weekly in accordance with RT-O-001-400-2.
4 During the BOC 12 startup, it was necessary to reduce power and remove the generator from service in order to replace the # 12 turbine bearing.
Power was reduced from 87% in accordance with GP-3 " Normal Plant Shutdown" on 10-09-96.
At approximately 20%
power, the main generator was manually tripped.
The turbine control, and stop valves performed as designed, and the
- bypass, reactor pressure and neutron flux spikes were well below the trip setpoints.
The feedwater control system maintained reactor water level throughout the transient, and the reactor did not scram due to the load rejection.
Following the transient, 6 BPVs were open and delivering steam to the main condenser, as designed.
The generator was returned to service on 10-11-96 and power ascension resumed.
,e Pags 28 2.24 Flow Control Objective Flow control testing was performed in accordance with UFSAR section 13.5.2.2.(28).
The objective was to determine the plant response to changes in recirculation flow and thereby adjust the local control loops.
The Recirc 30% and 45% limiters, and high speed mecbanical stops, will also be set.
Description j
\\
Various process variables will be monitored while changes (positive and negative) are introduced into the Recirc flow control system.
Acceptance Criteria The decay ratio is expected to be less than or equal to 0.25 for each process variable that exhibits oscillatory response to flow control changes.
i Results The Recirc pump 30% speed limiters were set on 10-03-96 in accordance with RT-I-002-230-2 " Recirculation Pump 30 Percent Speed Limiter In-Place Calibration".
The Recirc pump 45% speed limiters were set on 10-04-96 in accordance with RT-I-002-260-2 " Recirculation Pump 45 Percent
{
Speed Limiter In-Place Calibration".
l The Recirc M/G set high speed mechanical stops were placed in their final positions on 10-23-96 in accordance with GP-5 " Power Operations", when the target rod pattern / flow conditions were achieved.
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Page 29 e
2.25 Recirculation System Objectives I
Recirc system testing was performed in accordance with UFSAR section 13.5.2.2.(29).
The objectives were to determine transient responses and steady state conditions following j
i Recirculation pump trips at selected power levels, to obtain jet i
pump performance data, and to calibrate the jet pump and flow
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instrumentation.
Description Following each Recirc pump trip, process variables such as reactor pressure, steam and feedwater flow, jet pump differential a
pressure, and neutron flux will be monitored during the transient and at steady state conditions.
The jet pump instrumentation i
will be calibrated to indicate total core flow.
}
Acceptance criteria i
For each pump trip test, no core limits shall be exceeded.
Flow l
instrumentation shall be calibrated such that the reactor jet pump total flow recorder provides correct flow indication.
t i
i Results i
No Recirc pump trips occurred during the BOCl2 power ascension.
f During power ascension, jet pump operability was checked daily and performance was trended in accordance with ST-O-02F-550-2 j
" Jet Pump Operability".
The flow instrumentation calibration was checked by performing j
RT-I-002-250-2 " Core Flow Verification" at full flow conditions f
on 10-22-96.
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