ML20210B708
| ML20210B708 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 04/23/1987 |
| From: | PUBLIC SERVICE CO. OF COLORADO |
| To: | |
| Shared Package | |
| ML20210B688 | List: |
| References | |
| TAC-65445, NUDOCS 8705050398 | |
| Download: ML20210B708 (19) | |
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ATTACHMENT 2 TO P-87100 PROPOSED CHANGES TO THE FSV TECHNICAL SPECIFICATIONS i
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. Fort St. Vrain #1 Technical Sp:cifications Amendment No.
Page 5.4-2 Calibration frequency of the instrument channels listed in Tables 5.4.1, 5.4.2, 5.4.3, 5.4.4 are divided into three categories: passive type indicating devices that can be compared with like units on a continuous basis; semiconductor devices and detectors that may drift or lose sensitivity; and on-off sensors which must be tripped by an external source to determine their setpoint. Drift tests by GGA on transducers similar to the reactor pressure transducers (FSAR Section 7.3.3.2) indicate insignificant long term dri f t. Therefore a once per refueling cycle calibration was selected for passive devices (thermo-couples, pressure transducers, etc.). Devices incorporating semiconductors, particularly amplifiers, will be also calibrated on a once per refueling cycle basis, and any drift in response or bistable setpoint will be discovered from the test program.
Drift of electronic apparatus is not the only consideration in determining a calibration frequency; for example, the change in power distribution and loss of detector chamber sensitivity require that the nuclear power range system be calibrated every-month. On-off sensors are calibrated and tested on a once per refueling cycle basis.
The Surveillance Requirements for the Steam Line Rupture Detection / Isolation System instrumentation in Table 5.4-3 include provisions for CHANNEL CHECK, CHANNEL CALIBRATION, CHANNEL FUNCTIONAL TEST and an ACTUATION LOGIC TEST. The frequency of CHANNEL CALIBRATION, REFUELING, is consistent with the interval for testing and calibrating similar detectors (heat sensitive cabling used for fire detection). The manufacturer of the instrumentation recommends an 18 month interval for test / calibration of the electronics portion of the Steam Line Rupture Detection / Isolation System, thus, the CHANNEL FUNCTIONAL TEST is specified for that interval . The ACTUATION LOGIC TEST is specified for a REFUELING interval. The ACTUATION LOGIC TEST verifies proper operation of the SLRDIS Detection and Logic Racks from a simulated rate-of-rise input signal through and including actuation of the output logic relays. Time response of the SLRDIS Detection and Logic Racks is verified to be equal to or less than 7.1 seconds as assumed in the high energy line break analysis. The potential for an inadvertent actuation during testing suggests that logic testing be performed only when the plant is in SHUTDOWN. Thus, the surveillance requirements are specified for REFUELING but not to exceed 18 months. The SLRDIS control unit includes a supervision system that continuously and automatically monitors critical circuitry and internal components, and alarms SLRDIS trouble conditions to the operators.
Tests and calibrations of instrument channels in Tables 5.4-1, 5.4-2, 5.4-3 and 5.4-4 may be performed with either internal or external test signals. Use of the internal test signal is preferred, while equivalent external test signals are equally acceptable.
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. ' Fart St. Vrain #1 Tcchnical Specifications Amendment No.
Page 5.4-3 TABl.E 5.4-1 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS. AND TESTING OF SCRAM SYSTEM l Channel l l l l l Description i Function l Frequency (1)I Method l l 1. Manual la. Test l R la. Manually trip l l (Control Room)l l l system. l l 2. Manual (I-49) la. Test l M la. Manually trip each l l l l channel. -l l 3. Startup la. Check D la. Comparison of two l l Channel. l l l separate channel l l l l l indicators. l l l lb. Test l P lb. Apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l R lc. Internal test l l l l l signal shall be l l l l l checked and l l l l l calibrated to l l l l l assure that its l l l l l output is in l l l l l accordance with thel l l l l design l l l l l requirements. Thisl l l l l shall be done afterl l l l l completing the l l l l l external test l l l l l signal procedure byl l l l l checking the output l l l l l indi_ cation when l l l l l turning the l l l l l internal test l l l l l signal switch. l l 4. Linear Power la. Check l D la. Comparison of 6 l l Channel l l l separate channel l l l l l indicators. l l l lb. Test l M lb. Apply test l l l l l l signal to verify l j l l l l trips and alarms. l i l lc. Calibrate l D lc. Cnannel adjusted tol l l l l l agree with heat 1 i
l l l l balance l l l l 1 calculation. l l l ld. Calibrate l R ld. Apply test l l l l l l signals to adjust l l l l l l trips and l j l l l l indications. l ,
l S. Wide Range la. Check l D la. Comparison of threel l Power Channel l l l separate l l l l l l indicators. I l
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, Fort St. Vrain #1 Technical SpIcifications Amendment No.
Page 5.4-4 TABLE 5.4-1 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF-SCRAM SYSTEM (Cont'd) l Channel l l l l l Description I- Function l Frequency (1)l Method l l l S. (Cont'd) lb. Test l P lb. Apply test l l l l l signals to verify l l l l l trips and alarms. l l lc. Calibrate l M lc. Channel adjusted tol l l l l agree with heat l l l l l balance l l l l l . calculation. -1 l l ld. Calibratel R ld. Apply test l l l l l signals to adjust l l l l l trips and l l l l l indications. l l 6. Primary la. Check l D la. Comparison of two l l Coolant l l l separate high levell l Moisture (All l l l channel mirror l_
l Channels) l l l temperature l l l l l indications. l l lb. Check l 0 lb. Comparison of six -l l l l l separate low level l l l l l channel mirror l l l l l temperature l l l l l indications. l l lc. Calibrate l R lc. Inject moisture l l l l l laden gas into l l l l l sample lines. l l ld. Check l D ld. Verification of l l l l [ eight separate l l l l l monitor's sample l l l l l flow, per Item (t) l l l l l of Notes for Tables l l l l l 4.4-1 through l l l l l 4.4-4. l l le. Test l M le. Verify that each ofl l l l l the eight monitors l l l l l will alarm on low l l l l l and high sample l l l l l flow. l l 7. Primary ja. Test l M la. Trip one high l l Coolant l l l level, one low l l Moisture (Highl l l level channel, l l Level l l l pulse another low l l Channels) l l l level channel. l
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. Fort St. Vrain #1 Technical Sptcifications Amendment No.
Page 5.4-5 TABLE 5'.4-1 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF SCRAM SYSTEM (Cont'd) l Channel l l l l l Description l Function IFrequency(1)l Method l l 8. Reheat Steam la. Check l D la. Comparisnn of the l l Temperature l l l averaged l l l l l thermocouple l l l l l channel. input l l l l l indications. l l lb. Test l M lb. Trip channel, l l l l l verify alarms and l .-
l l l l indications. l l l l l l Apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l R lc. Compare each l l l l l thermocouple output l l l l l to an NBS traceable l l l l l l standard. Apply l l l l l test signal to l l l l l adjust trips and l l_ l l l indicators. l l 9. Primary la. Check l D la. Comparison of six l l Coolant l l l separate channel l l Pressure l l l indicators. l l lb. Test l M lb. Trip channel, l l l l l l apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l R lc. Known pressure l l l l l applied to sensor. l l l l l l Apply test l l l l l signal to adjust l l l l l trips and l l l 1 l indicators. l l10. Circulator la. Check l 0 la. Comparison of eightl l Inlet l l l separate l l Temperature l l l indicators. l l lb. Test l M lb Trip channel, l-l l l l l apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l R lc. Compare each l l l l l thermocouple output l l l l l to an NBS traceable l l l l l l standard. Apply l l l l l test signal-to l l l l l adjust trips and l l l l l indicators. l
Fort St. Vrain #1 Tcchnical Specifications Amendment No.
Page ~ 5.4- 6 TABLE 5.4-1 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING 0F SCRAM SYSTEM (Cont'd) l Channel l l l l-l Description I Function IFrequency(1)I Method l l11. Hot Reheat la. Test l M la. Reduce pressure at l l Header l l l sensor to trip l l Pressure j l l channel, verify l l l l l . alarms and l l l~ _l l indications. -
~l l lb. Calibrate l R lb. Known pressure l l l l l applied at sensor l l l 1 l to adjust trips. l l12. Main Steam .la. Test l M la. Reduce pressure at l l Pressure l l l sensor to trip l l l l l channel, verify l l l l l alarms and l l l l l indications. l
'l lb. Calibrate l R lb. Known pressure l l l l l applied at sensor l l l l l to adjust trips. l l13. Two Loop la. Test l M la. Special test modulel l Trouble l l l used to trip l l l l l channel by l l l l l energizing each of l l l l l four appropriate l l l l l pairs of two-loop l l l l l trouble relays. l l lb. Test l R lb. Trip logic to causel l l l l two loop trouble l l l 1 I scram. l l14. Plant 480 V la. Test l M la. Trip each channel l l Power Loss l l l by applying l l l l l simulated loss of l l l l l voltage signal; l l l l l verify alarms and l l l I l indications. l l
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.. Fort St. & ain #1 Technical Specifications Amendment No.
Page 5.4 TABLE 5.4-1 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF SCRAM SYSTEM (Cont'd) l Channel l l l l l Description i Function IFrequency(1)I Method l l15. High Reactor la. Check l D. la. Comparison of threel l Building l l l separate channel l l Temperature l l l indicators. l l (Pipe Cavity) lb. Test l M lb. Trip channel, l l l l l verify alarms and l l l l l indications. l
_l l l l l_ Apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l R lc. Compare each l l l l l thermocouple output l l l l l' to an NBS traceable l l l l l standard to adjust l l l l .l temperature trip l l 1 1 I point. l l
NOTE 1: D - Daily when in use M - Monthly R - Once per refueling cycle P - Prior to each start-up if not done previous week
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. Fort St. Vrain #1 Technical Specifications Amendment No.
Page 5.4-8 TABLE 5.4-2 MINIMUM FREQUENCIES'FOR CHECKS, CALIBRATIONS, AND TESTING OF LOOP SHUT 00WN SYSTEM l Channel l l l l l Description i Function IFrequency(1)l Method l l 1. Deleted- l l l l l l l l l l 2. Deleted l l l l l l 1 I l l 3. Circulator 1A la. Test l M la. Pulse test and l
[ and IB Tripped l l l verify proper l' l l l l indications. l l lb. Test l R lb. Trip both l l l l l circulators to testl l l l l loop shutdown. l l 4. Circulator 1C la. Test l M la. Pulse test and l l and 10 Tripped l l l verify proper l l l l l indications. l l lb. Test l R lb. Trip both l l l l l circulators to testl l_ l l l loop shutdown. l l S. Steam la. Test l M la. Pressure switches l l Generator l l l actuated by l l Penetration l l l pressure applied. l l Pressure Ib. Test l M lb. Pulse test each l l l l l channel with l l l l l another channel l l l l l tripped and verify l l l l- l proper indications.l l lc. Calibrate l R lc. Known pressure l l l l l applied at sensor l l [ l [ to adjust trip. l l l l l l
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. ' Fort St. Vrain #1 Tcchnical Specificaticns Amendment No.
- Page 5.4-9 TABLE 5.4-2 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF LOOP SHUTDOWN SYSTEM (Cont'd) l Channel l l l- l l Description i Function' l Frequency (1)l Method l l 6. Reheat Headerla. Check l 0 la. Comparison of threel l Activity l l l separate indicators l l l l l in each loop. l l lb. Test l M lb. Pulse test each l J
l l l l channel with l l l l l another channel l l l l .l tripped and verify l l -l l l proper indications.l J
l lc. Calibrate l R lc. Expose sensor-to_ l l l l l l known radiation l source and adjust l l l l l l l l l trips and l
, l l l l indicators. l l 7. Superheat la. Check l D la. Comparison of 3 l l Header l l l= separate l l Temperature l l l temperature l
' l l l l indicators per l l l l l loop. l l lb. Check l D lb. Comparison of 3 l l l l l separate l l l l l temperature l l l l l differential l l l l l indicators. l l lc. Test l M lc. Pulse test one l l l l l channel with l l l l l l another channel l 1 l l l l tripped and verify l l l l l proper indications.l ;
l ld. Calibratel R ld. Compare each l l l l l thermocouple output l l l l l to an NBS traceable l l l l l l standard. Apply l l l l l test signal to l l l l l adjust trips and l l l l l indicators. l i
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l Fort St. Vrain #1 Technical Sp;cifications-Amendment No.
Page 5.4-10 o
TABLE 5.4-2 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF LOOP SHUTDOWN SYSTEM (Cont'd) l Channel -l .l .
l l l Description l Function l Frequency (1)l Method l l 8. Primary la. Test l M la. Trip each channel, l l . Coolant l l l verify proper l l Moisture (Low l l l indications. l l Level lb. Test l M lb. Trip each channel, l l Channels). l l l pulse test other l l l l l loop to check loop }
l l l l identification. l l 9. Primary la. Test l M. la. Pulse test one l l' Coolant l l l channel with l l Pressure l l l another channel l l l l l tripped and verify l l l l l proper indications,l l l l l both channels. l i
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i l
NOTE 1: 0 - Daily when in use i
M - Monthly ;
- R - Once per refueling cycle 1 P - Prior to each start-up if not done previous week
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. Fort St.-Vrain #1 Technical Sp:cifications Amendment No.
Page 5.4-11 TABLE 5.4-3 MINIMUM FREQUENCIES FOR' CHECKS, CALIBRATIONS, AND TESTING OF CIRCULATOR TRIP SYSTEM-l Channel l l l l-l Description ( Function IFrequency(1)l Method- l l 1. Circulator la. Check l 0 la. Comparison of 6 l l Speed-Steam l l l separate speed l l and Water l l l indications per l-l l l l . circulator. l l l- lb. Test l M lb. Apply test l l l l l signal to verify l l l l l trip setting and l l l l l indicators. l l lc. Test l M 'lc. Pulse test one l l l l l channel with l l l l l another channel l l l l l tripped, and verify l l l l l proper indications.l l ld. Calibrate l R ld. Known pulse l l l l l frequency applied l l l l l at sensor to adjustl l l l l trips and l l l I I indicators. l l 2. Feedwater Flowla. Check l D la. Comparison of 6 l l l l l separate. indicators l l l l l per loop. l l l lb. Test l M lb. Apply test l l l l l signal to verify l l l l l trip setting and l l l l l indications. l l lc. Test i ti lc. Pulse test one l l l l l channel with l l l l l another channel l l l l l tripped, and verifyl l l l l proper indications.l l ld. Calibrate l R ld Apply known delta Pl l l l l at flow l l l l l transmitter. l l l l l l Apply test l l l l l signal to adjust l l l l l trips and l l l l l indicators. l l 3. Circulator la. Check l 0 la. Comparison of 3 l l Bearing Water l l l separate l l Pressure l l l indicators / l l l l l circulator. l
. Fcrt St. Vrain #1 .
Technical Specifications Amendment No.
Page 5.4-11a TABLE 5.4-3 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF CIRCULATOR TRIP SYSTEM (Cont'd) l Channel l l l .
l l Description !- Function l Frequency (1)l Method l l 3. (Cont'd) lb. Test l M lb. Pulse test one l l l l 'l channel with l l l l l another channel .l l- l l l tripped and verify l l l l l proper. indications.l l lc. Calibrate l R lc. Known pressure l l l l l applied to' adjust 'l l ! l l trip setting. l l 4. Circulator la.. Test i M la. Pressure switches l l Penetration l l l actuated by l l Pressure l l l pressure applied. l l lb. Test l M lb. Pulse test one l l l l l channel with l l l l l another channel l l l l l tripped and verify l l l l l proper indications.l l lc. Calibrate l R lc. Known pressure l l l l l applied at sensor l l l l l to adjust trip l l l l l setting. _l l S. Circulator la. Check l D la. Comparison of 3 l l Drain Pressurel l l separate l l l l l indicators / l l l l l circulator. l l lb. Test l M lb. Pulse test one l l l l l channel with l l l l [ another channel l l l l l tripped and verify l l l l l proper indications.l l lc. Calibratel R lc. Known pressure _l l l l l applied at sensor l l l l l to adjust trip l l l l l setting. l l 6. Circulator la. Check l 0 la. Comparison of 3 l l Seal l l separate Malfunction l l )
l l l l indicators / l ;
I l circulator.
l lb. Test l
l M l
lb. Pulse test one l
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-l1 l l l l channel with l l l l l another channel l l l l l tripped and verify l l l l l proper indications.l I
.x Fort St.'Vrain #1 Technical Specifications Amendment No.
Page 5.4-11b TABLE 5.4-3 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF CIRCULATOR TRIP SYSTEM (Cont'd) l . Channel l .l l l Description l Function IFrequency(1)l Method l
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- l 6. (Cont'd) lc. Calibrate l R lc. Knowr pressure l l l l l applied at sensor l l l l l to adjust trip l l l l l setting. l l 7. Circulator la. Test .l R la. Trip steam turbine l l' Trip (Manual) l l l drives. Verify l J
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l l l water turbine l l l l l automatic start. l 1
r NOTE 1: 0 - Daily when in use M - Monthly R - Once per refueling cycle P - Prior to each start up if not done previous week
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. . Fort St. Vrain #1 Technical Specifications Amendment No.
Page 5.4-11c TABLE 5.4-3 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF CIRCULATOR TRIP SYSTEM (Cont'd) l CHANNEL CHANNEL ACTUATION l l _ FUNCTIONAL CHANNEL CALIBRA- FUNCTIONAL LOGIC l lNO. UNIT CHECK TION TEST ~ TEST APPLICABILITY l l l l8a. Steam Leak 0 R(a) R(a) R(b) At Power
- l l Detection l l Turbine Building l l Loop 1 l l l l8b. Steam Leak D R(a) R(a) R(b) At Power
- l l Detection l l Reactor Building l l Loop 1 l l l l8c. Steam Leak D R(a) R(a) R(b) At Power
- l l Detection l l Turbine Building l l Loop 2 l l l l8d. Steam Leak D R(a) R(a) R(b) At Power
- l l Detection l l Reactor Building l l Loop 2 l l l Notes to lines 8a. through 8d. above only:
(a) The calibration / test consists of verifying the rate of rise setpoint and checking for opens and shorts in the sensor cable.
(b) The SLRDIS Detection and Logic racks shall be verified to have a response time less than or equal to 7.1 seconds when a simulated rate-of-rise trip input signal is used to actuate the output relay logic.
R - At least once per Refueling cycle, not to exceed 18 months Applicable only above 2% RATED THERMAL POWER D - Daily
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, Fort St. Vrain #1 Tcchnical Specifications Amendment No..
Page 5.4-Ild TABLE 5.4-4 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF R00 WITH0RAWAL PROHIBIT SYSTEM l Channel l l l l l Description l Function IFrequency(1)I Method l l 1. Start-up la. Check l 0 la. Comparison of two l l Channel l l l separate channel l' l l l l indicators. l l l lb. Test l P lb. Apply test l l l l l signal to verify l l l l l all trips and l l l l l alarms. l l lc. Calibrate l R lc. The internal test l l l l l signal'shall be l l l l l checked and l l l l l calibrated to l l l l l assure that its l l l l l output.is in l l l l l accordance with thel l l l l design l l l l l requirements. Thisl l l l l shall be done afterl l l l l completing the l l l l l external test l l l l l signal procedure byl l l l l checking the output l l l l l indication when l l l l l turning the l l l l l internal test l l 1 l l signal switch. l l 2. Linear Channella. Check l 0 la. Comparison of 6 l l l l l . separate level l l l l l indicators. l l l lb. Test l M lb. Apply test l l l l l signal to verify l l l l l trips and alarms. l l lc. Calibrate l 0 lc. Channel adjusted tol l, l l l agree with heat l l l l l balance l l l l l calculation. l l l ld. Calibrate l R ld. Apply test l l l l l signals to adjust l l l l l trips and l l l l l indications. l l 3. Wide Range la. Check l 0 la. Comparison of threel l Power Channel l l l separate l l l l l indicators. l
_ _ = _ _ _ _ _ _ _ _ - _ - - _ =
'* Fort St. Vrain 11 Technical Specifications Amendment No. -
Page 5.4-11e TABLE 5.4-4 MINIMUM FREQUENCIES FOR CHECKS, CALIBRATIONS, AND TESTING OF R00 WITH0RAWAL PROHIBIT SYSTEM (Cont'd) l Channel l l l- l l Description i Function IFrequency(1)I Method I.
l l 3. (Cont'd) lb. Test l P lb. Apply test l l l l l signals to verify l l .l .
l l trips and alarms. l l lc. Calibra- l M lc. Channel adjusted tol l l tion l l agree with heat l l l l l balance l J l l l calculation. l l l ld. Calibra- l R ld. Apply test l l l tion l l signals to adjust l l l l l trips and. l l l l l indications. ~l l 4. Multiple Rod la. Test l P la. Attempt two rod l l Pair l l l pair withdrawal. l l Withdrawal Ib. Check l R lb. Simulate current l l l l l through sensor to l l l l l verify trip and l l l l l alarms. l NOTE 1: 0 - Daily when in use M - Monthly R - Once per refueling cycle P - Prior to each start-up if not done previous week A
0 ATTACHMENT 3 TO P-87100
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SIGNIFICANT HAZARDS CONSIDERATION
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' Attachment 3 to P-87100 Page 2 SIGNIFICANT HAZARDS CONSIDERATION 1
The' proposed amendment would modify -Technical Spe'cification 5.4,
" Instrumentation and Control Systems - Surveillance .and Calibration Requirements," Tables 5.4-1.through 5.4-4 which provide the minimum frequencies for. checks, calibrations, and testing of- the Plant Protective System (PPS) parameters. The proposed amendment would replace the referenced method for the application of' an " internal" test signal for verificatita of trips and alarms and adjustment for trips and indications by specifying only that -a test signal be applied. This change would provide the alternative of using either an internal test signal within the appropriate instrument channel ' or i an external test signal to simulate the sensor input. Both test signals are calibrated to NBS traceable standards. This change is all inclusive within Technical Specification 5.4 with the. exception 3
of the Scram and Rod Withdrawal Prohibit Startup Channel calibration requirements.
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i An applied test signal demonstrates' functional; operability and verification of channel response .w ithin a specified . range and i accuracy. The testing process ensures the capability of-safety j systems to perform their intended design -function. ~ Proper surveillance procedures exist to ensure that appropriate calibration and verification test methods are' performed 'to ' demonstrate operability requirements.
BASIS FOR NO SIGNIFICANT HAZARDS CONSIDERATION:
The proposed amendment does not involve a 'significant- hazards consideration because operation of Fort St. Vrain Nuclear Generating Station in accordance with this change:
(1) Does not involve a significant increase in the probability or consequences of an accident previously evaluated. This change
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allows for the diversity and flexibility of using-either an-l internal -or external test signal appropriately- applied ~ to
! demonstrate safety system operability requirements. Both test signal sources are calibrated in accordance with NBS traceable standards. Operability requirements are not _ changed -by eliminating the specific test method referenced for the application of an internal test signal. The use of an external ,
test signal does not change the probability for an inadvertent-actuation of a PPS automatic action. Use of either; test method provides a simulated input injected as closely as possible to :
actual sensor input considering system design. Use of an !
external test signal does.not deviate from the requirements of' !
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Attachment 3 to P-87100 Page 3
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IEEE-279, ' August 1968, committed to in the FSAR nor Criterion'19 of.the FSAR General Plant Design Criteria. Also, the deletfon of specific test methodology is consistent with the level of detail-provided .in the Standard Technical Specifications (STS).
Therefore, this change. does not increase the probability'or
- consequences of an accident.
(2) Does not create the possibility of a new or different. kind of accident from any previously evaluated. It has been determined that a new or different kind of accident will.not be possible due to this change. The elimination of' referencing a specific test method allows the alternative to use equivalent test methods to accomplish required surveillances for demonstrating operability requirements. Regulatory requirements are still accomplished by this proposed change. Therefore, no new or different kind of accident has been created.
(3) Does not. involve'a significant reduction in'a margin of safety.
Applying an appropriate test signal, either from a internal or an -
external source, ensures that safety systems are verified for functional requirements and calibrated within a specified range and accuracy. Proper surveillance procedures exist to ensure that appropriate levels of testing. are . accomplished to demonstrate operability. Allowing diversity 'in the use. of sources with equivalent test signals enhances the' ability 'to ensure that surveillance frequencies and requirements are met.
Therefore, this change does not reduce the margin of safety.
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