ML24100A767
| ML24100A767 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs, Dresden, Peach Bottom, Nine Mile Point, Byron, Braidwood, Limerick, Ginna, Clinton, Quad Cities, FitzPatrick, LaSalle  |
| Issue date: | 04/11/2024 |
| From: | Robert Kuntz Constellation Energy Generation |
| To: | Rhoades D Plant Licensing Branch III |
| Wall, SP | |
| References | |
| Download: ML24100A767 (1) | |
Text
NRC Pre-Submittal Meeting ConstellationFleetInservice TestingProgramReliefRequest toUtilizeOMN32
- Relief Request
- Code Case
- 10 CFR and ASME References
- Submittal and Precedent
- Summary
- Questions AGENDA l NRC Pre-submittal Meeting for RR to utilize OMN-32 1
- The relief request is for an alternative pursuant to 10 CFR 50.55a (z),
Alternatives to codes and standards requirements, to utilize ASME Code Case OMN-32, Alternative Requirements for Range and Accuracy of Pressure, Flow, and Differential Pressure Instruments Used in Pump Tests.
- Code Case OMN-32 provides alternative testing instrument accuracy and range requirements for flow, pressure, and differential pressure instruments used for Group A, Group B, Comprehensive, and Preservice pump tests
-Instruments used for speed and vibration testing would continue to meet the existing instrument accuracy and range requirements in ASME OM Code.
- Code Case OMN-32 would apply to all pumps in the Inservice Testing (IST)
Program at each of Constellations 21 Nuclear Units.
- Use of Code Case OMN-32 would eliminate the need to install temporary instruments reducing dose and person-hours.
RELIEF REQUEST 2
l NRC Pre-submittal Meeting for RR to utilize OMN-32
- Code Case OMN-32 was issued for use by ASME on September 11, 2023 CODE CASE OMN-32 3
CodeCaseOMN32Alternative CurrentRequirement ASMECode Section Theanalogordigitalinstrument(s)shallbe calibratedwithinthelimitsspecifiedinTable1 fortherespectivetestquantity.Foran instrumentloop,therequiredaccuracyis instrumentloopaccuracyasdefinedinISTA 2000.
InstrumentaccuracyshallbewithinthelimitsofTableISTB35101.Ifa parameterisdeterminedbyanalyticalmethodsinsteadof measurement,thenthedeterminationshallmeettheparameter accuracyrequirementofTableISTB35101(e.g.,flowrate determinationshallbeaccuratetowithin+/-2%ofactual).Forindividual analoginstruments,therequiredaccuracyispercentoffullscale.For digitalinstruments,therequiredaccuracyisoverthecalibratedrange.
Foracombinationofinstruments,therequiredaccuracyisloop accuracy ISTB3510(a),
Accuracy Theanalogordigitalinstrument(s)shallbe designedandcalibratedintherangeforuseat theexpectedreading(e.g.,referencevalue)to bemeasuredorrecordedduringthetest.
(1) Thefullscalerangeofeachanaloginstrumentshallbenotgreater thanthreetimesthereferencevalue.
(2) Digitalinstrumentsshallbeselectedsuchthatthereferencevalue doesnotexceed90%ofthecalibratedrangeoftheinstrument.
ISTB3510(b),
Range CodeCaseOMN32Alternative CurrentRequirement Comprehensiveand PreserviceTests,%
GroupAandGroupB Tests,%
Comprehensiveand PreserviceTests,%
GroupAandGroupBTests, Quantity
+/-11/2
+/-6
+/-1/2
+/-2 Pressure
+/-6
+/-6
+/-2
+/-2 FlowRate
+/-11/2
+/-6
+/-1/2
+/-2 Differentialpressure l NRC Pre-submittal Meeting for RR to utilize OMN-32
- Constellation has reviewed the following applicable provisions of 10 CFR 50.55a and the ASME Code:
-10 CFR 50.55a(b)(3), Conditions on ASME OM Code
-10 CFR 50.55a(b)(6), Conditions on ASME OM Code Cases
-10 CFR 50.55a(f)(4), Inservice testing standards requirement for operating plants
-10 CFR 50.55a(f)(5), Requirements for updating IST programs
-ASME OM-2004, with 2006 Addenda, Section ISTB 3510, General
-ASME OM-2012, no Addenda, Section ISTB 3510, General
-ASME OM-2017, no Addenda, Section ISTB 3510, General 10 CFR AND ASME REFERENCES 4
l NRC Pre-submittal Meeting for RR to utilize OMN-32
- Constellation is targeting submittal by the end of April 2024 with a standard one-year approval period.
- The submittal will be the first in the industry for a relief request to utilize ASME Code Case OMN-32.
- Constellations submittal will incorporate two comments provided by the NRC during the review and subsequent approval of Code Case OMN-32.
-The title of the proposed Requirements and the corresponding Table were modified to state, Required Instrument Accuracy and Range.
-The use of analytical methods may be used provided the parameter determination meets the required OMN-32 accuracy.
- No deviations from OMN-32 are being proposed.
PRECEDENT/SUBMITTAL 5
l NRC Pre-submittal Meeting for RR to utilize OMN-32
- The relief request is for an alternative pursuant to 10 CFR 50.55a(z) to utilize ASME Code Case OMN-32
- Code Case OMN-32 provides alternative testing instrument accuracy and range requirements for flow, pressure, and differential pressure instruments.
- Constellation is targeting submittal by the end of April 2024; submittal will include each of Constellations 21 Nuclear Units.
- Constellations submittal will be the first in the industry for a relief request to utilize ASME Code Case OMN-32.
- The submittal will incorporate two comments provided by the NRC during the review and subsequent approval of Code Case OMN-32.
- No deviations from the Code Case are being proposed.
SUMMARY
/KEY TAKEAWAYS 6
l NRC Pre-submittal Meeting for RR to utilize OMN-32
QUESTIONS?
7 lNRCPresubmittalMeetingforRRtoutilizeOMN32