ML20116F085
| ML20116F085 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 11/03/1992 |
| From: | UNION ELECTRIC CO. |
| To: | |
| Shared Package | |
| ML20116F077 | List: |
| References | |
| NUDOCS 9211100165 | |
| Download: ML20116F085 (12) | |
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4 ATTACHMENT 1 TECHNICAL SPECIFICATION CHANGES 9211100165 921103-
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TAELE 4.3-1 (Con'tinuedl TABLE tiOTATI0rtS
=0nly if the Reactor Trip System breakers happen to tt closed and the Control Rod Drive System is capable of red withdrawal.
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- The specified 18 month frequency civ be waived for Cycle I provided the surveillar.ce is performed prior to restart following the first refueling outage or June 1.1955, whichever occurs first. The provisions of Specification 4.0.2 are reset fro perfon!ance of this surveillance.
AeBelow P-6 (Inter-.ediate Range lieutron Flux interlock) Setpoint.
miele. F *O (Le.c Set:cint Po er Dr.;e lieutren Flux interlock) Setpoint.
(1) If net performed in crevious 31 days.
(2) Com:arison of caloriretric to excore power indication above 15*, of PATE:
THERFAL P0aER. Acjust excore entnnel gains censistent with caloritetric power if absolute difference is greater than 2%. Tne provisions of Specification 4.0.4 are not applicable frir entry into MODE 2 or 1.
f (3) Single point comparison of incore to excore AXIAL FLUX O!FFERENCE above C
15% of RATED THERFAL POWER. Recalibrate if the absolute difference is 3 <r greater than or equal to 3%. The provisions of Specification 4.0.4 are not applicable for entry into H3DE 2 or 1.
g 3 T (4) fleutron detectors may be excluded from CHANrtEL CALIEPATION.
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. cnInTe'Iftlk provisions of Specification 4.0.4 are not applicable for entry into tt3DE 2 or 1.
(6) Incore - Excore Calibration, abeve 75t of RATED THERFAL POWER. The provi-sions of Specification 4.0.4 are not applicible for entry into MODE 2 or 1.
Deter.nination of the loop specific vessel aT value should be made when perfoming the Incore/Excore quarterly recalibration, under steady state conditions.
(7) Each train shall be trited at least every 62~ days on a STAGGE%D TEST BUIS.
The TRIP ACTUATING DEVICE OPERAT10NAL TEST shall independently verify the OPERABILITY of the Undervoltage and Shunt Trip Attachments of the Reactors Trio Breakers.
(8) Deleted f
(9) Quarterly surveillance in H3 DES 3*,
4*, and 5* shall also include verifics-tion c at permissives P-6 and P-10 are in their req 4 ired state for existing l
plant conditions by observation of the permissive annunciator window.
Quarterly surveillance shall include verification of the Boron Dilution Alarm Setpoint of less than or equal to an increase of twice the count rate within a 10-minute period.
CALLAWAY - Utt!T 1 3/4 3-12 Amendment No. Jf, 28
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i For Source Range detectors, integral bias curves are obtained, evaluated, and compared to manufacturer's data.
For Intermediate Range and Power Range channels, detector plateau curves shall be obtained, evaluated, and compared to manufacturer's data.
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l IARLE NOTATIOtn
- Only if the Reactor Trip System breakers happen to be closed and the Control Rod Drive System is capable of rod withdrawal.
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- The specified 10 month frequency may be waived for Cycle I provided the surveillance is performed prior to restart following the first refueling outage or Juno I
1,1988, whichever occurs first. The provisiond of Specification 4.0.2 are resot from performanco of this surveillance.
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- Below P-6 (Intermediate Range Neutron Flux interlock) Setpoint-
- Below P 10 (Low Setpoint Power Range Neutron Flux interlock) Setpoint.
(1) If not performed in previous 31 days, i
(2) Comparison of calorimetric to excore pcwer indication above 15% of RATED THERMAL PO'NER Adjust excore channel gains consistent with calorirnetric power if absolute diffetonen is greater than 2% The provisions of Specification 4.0.4 are not applicable for entry into MODE 2 or 1.
(3) Single point comparison of incore to excore AXIAL FLUX DIFFERENCE above 15%
of RATED THERMAL POWER. Rocalibrate if the absoluto difference is greater than or equal to 3% ine provisions of Specification 4.0.4 are not applicable for entry-into Mode 2 or 1.
(4) Neutron detectors may be excluded from CHANNEL CAllBRATION.
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(5) For Source Range detectr es, integral bias curves are obtained, evaluated, atd compared to manufacturer's data. For intermediate Range and Power. Range channels, detector plateau curves shall be obtained, evaluated, and compared to s
manuf acturer's data. For the Intermediate Range and Power Range Neutron Flux channels the previsions of Specification 44,4 are not applicable for entry intn MODE 2 or 1.
(6) Incoro Excore Celibration, above 75% of RATED THERMAL POWER. The E
provisions of Specifwation 4.0.4 are not applicable for entry into MODE 2 er 1.
I Determination of the loop specific vessel AT value should be made when performing the incoro/Excoro quarterly recalibration, under steady state conditions.
(7) Each train shall De tested at least every 62 dayL on a STAGGERED TEST-BASIS.
H The TR!l-ACTUATING DEVICE OPERATIONAL TES*T shellindependently verify tho OPERABILITY of the Undervoltago and Shunt Trip Attachments of the Reactors Trip Brookers.
l" (8) Deleted (9) Ouarterly surveillance in MODES 3',4", and 5* shall also include verification that permissives P-6 and P-10 are in their requimd state for existing plant conditions by a
observation of the permissive annunciator window. Quarterly surveillance shall:_
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. include verification of the Boron Difution' Alarm Setpoint of less then or equa! '.o an increase of twice the count rate'within a 10-minute period.
p-P 1 Amendment No?79,28.
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Page 1 of 2 4
SAEETY EyLLVATION This amendment application requests a revision tc Technical Specification Table 4.3-1, Note 5, to reflect that integral bias cu rves, rather than detector plateau curves, are used to calibrate the source range instrumentation.
Intermediate Range and Power Range _ channels will continue to be calibrated.using detector plateau curves.
At the Callaway Plant, the implementation of the Boron Dilution Mitigation System added a low-noise preamplifier
(" preamp") to the source range detector channel of the Nuclear Instrumentation System ("NIS") during the-original design.
The caliblation of the source range NIS is now performeo by running an integral bias curve rather than a plateau curve.
The integral bias curve sets up the high voltage as well.as the preamp gains and discriminator bias.
It is a more inclusive calibration than the plateau curve and pr>vides the same _information, i.e.,
- ha-high voltage operating point.
The proposed change to Technical Specification Table 4.3-1 does not involve an unreviewed safety question because operation-of the Callaway Plant with this change would.not:
1.
Increase the probability of occurrence or consequences-of'an accident'or malfunction of equipment important to safety previously evaluated in the safety analysis report.
Plant equipment is not modified by calibrating the NIS source range instrumentation using the in*egral bias curve.
Using'the integral bias curve is a more inclusive calibration-than tbn plateau curve and provides -the same information, i.e.,
the high voltage operating point._ The change does not affect accident initiators or assumptions..
The consequences due to accidents previously evaluated are not being-changed.
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Create-the possibility for an accident ~or malfunction'of a different type than any previously_ evaluated inithe safety analysis report.
No: new accidents are created by the. changes being made..No ne*. equipment is being added.
No new modes >of operation or:
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- means of control are being made.
The probability of a l
malfunction of equipment important to safety is-unchanged since the calibration of the NIS source range.
instrumentation--using - the integral bias curve, rather than:
the plateau curve, provides the same informatic7, -The consequences of_malfuncticns of equipment important to safety are not.. changed.- No new malfunctions are.being-created.; No-new-controlling modes or equipment operations are being created, i
ULNRC-2 718
' Attachment 2 Page 2 of 2 3 '.
' educe the argin of_ safety-as defined in the basis for any technical E ecification.
Using the integral bias curve 4.s a -more inclusive calibration than the plateau curve and provides the same information, i.e.,
tae high voltage operating point.
Given the above discussions, as well as those presented in the Signifi~ ant Hazards Consideration, the proposed change does not adversely affect or endanger the health or safety-of the general public or involve a significant safety hazard.
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ATTACHMENT 3 SIGNIFICANT HAZARDS EVALUATION.
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Page 1 of 2 i
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SIGNIFICANT HAZARDS-EVALUATIQN I
l This amendment application requests a revision to Technical Specification Table 4.3-1, Note 5, to reflect that integral bias curves, rather than detector plateau curves, are used to calibrate the source range instrumentation.
Intermediate Range and Power Range channels will continue to be calibrated using detector plateau curves.
At the Callaway Plant, the implementation of the Boron i
Dilution Mitigation System added a low-noise preamplifier i
(" preamp") to the source range detector channel of the Nuclear Instrumentation System ("NIS") during the original design._ The calibration of the source range NIa is now performed by running
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an integral bias curve rather than a plateau' curve.
The integral bias curve sets up the high voltage as well as the preamp gains and discriminator bias.
It is a more inclusive calibration than the plateau curve and pr^vides the same information, i.e.,
the high voltage operating point.
The proposed change to Technical Specification Table 3.3-4 does not involve a significant hazard consideration because operation of the Callaway Plant with this change would not:
1.
Involve a significant increase in the probability or consequences of an accident previously evaluated.
j Plant equipment is not modified by calibrating the NIS cource range instrumentation using the integral bias curve.
Using the integral-bias curve is a more inclusive calibration than the plateau curve and provides the same information, i e.,
the high voltage operating' point.
The change does not affect accident initiators or assumptions.
The consequences due to accidents previously evaluated are not being changed.
2.
Create the possibility of a new or different kind of accident from any previously evaluated.
No new accidents are created by the changes being made.
No new equipment is_being added.
No new modes-of operation or means of control are being made.
The probability of a malfunction of equipment importantLto safety is_ unchanged.
since the-calibration =of the NIS-source Tange-instrumentation using the integral bias curve,.rather than G
the plateau curve,-provides the same information.
The consequences of malfunctions of equipment important to safety.are'not_ changed.
No new malfunctions are being.
created.
-No new-controlling modes or-equipment operations are:being created.
3.
Involve-a significant reduction in a margin of safety.
- Using the integral _ bias curve is a_more inclusive calibration-than the plateau curve ~and provides the-.aame'
- information, i_.e.f the high voltage operating. point.
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f As discussed above, the proposed change does not involve a' significant increase in the probability or consequences of an accident previot' y evaluated, create the possibility of a new or different kind of accident from any previously evaluated, or result in.a significant reduction in a margin of safety.
- Therefore, it has been determined that the proposed change does not involve a significant hazards consideration.
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i ULNRC-2 718 Page 1 of 1 ENVIROFEFJTAL CONSIDJFATION This amendment application requests a revision to Technical Specification Table 4.3-1, Note 5, to reflect that integral bias curves, rather than detector plateau curves, are used to j
calibrate the source range instrumentation.
At the Callaway Plant, the implementation of the Boron Dilution Mitigation System added a law-noise preamplifier
("preanp") to the source range detector channel of the Nuclear Instrumentation System ("NIS") during the original design.
The calibration of the source range NIS is now performed by running an integral bias curve rather than a plateau curve.
The integral bias cui sets up the high voltage as well as the preamp gains t
and disc 2iminator bias.
It is a more inclusive calibration than the plateau curve and provides the same information, i.e.,
the high voltage operating point.
The proposed amendment involves changes with respect to the use of facility components located within the restricted area as defineu in 10 CFR 20, and changes a surveillance requirement.
Union Electric has determined that the proposed amendment does not involve:
1)
A significant hazard consideration, as discussed in of this amendment applica ion; 2)
A signif.icant change in the types or significant increase in the amounts of any effluents that may be released offsite; 3)
A significant increase in individual or cumulative occupational radiation exposure.
Accordingly the proposed amendment meets the e'igibility criteria for categorical exclusion set forth in 10 CFR S1.22 (c) (9).
Pursuant to 10 CFR 51.22 (b) no environmental impact statement or environmental assessment nee ' he prepared in connection with the issuance of this amendment.
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