ML24100A767

Meeting Slides - Preapplication with Constellation on Planned Fleet Alternative Request to Adopt OMN-2

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