ASME Code Case N-638-10

	Issue date	Site	Title	Topic
NMP1L3563, Submittal of Relief Request I5R-12, Revision 0, Concerning the Installation of a Full Structural Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	4 December 2023	Nine Mile Point	Submittal of Relief Request I5R-12, Revision 0, Concerning the Installation of a Full Structural Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	Weld Overlay Nondestructive Examination VT-2 Intergranular Stress Corrosion Cracking Stress corrosion cracking Liquid penetrant Through-Wall Leakage Dissimilar Metal Weld DM weld
ML23325A160	17 November 2023	Palo Verde	Supplemental Submittal - Relief Request 70 – Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle	Affidavit
ML23299A305	26 October 2023	Palo Verde	Response to Request for Additional Information – Relief Request 70 – Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle	Stress corrosion cracking
ML23298A123	25 October 2023	Palo Verde	NRR E-mail Capture - Palo Verde, Unit 1 - RAIs for Relief Request 70, Proposed Alternatives for Pressurizer Lower Shell Temperature Nozzle	Stress corrosion cracking
ML23249A184	18 September 2023	Beaver Valley	Authorization and Safety Evaluation for Alternative Request No. 2-TYP-4-RV-06	Liquid penetrant
ML23156A682	22 June 2023	Nine Mile Point	Authorization and Safety Evaluation of Alternative Relief Request I5R-11	Weld Overlay Intergranular Stress Corrosion Cracking Stress corrosion cracking Dissimilar Metal Weld DM weld
05000412/LER-2023-001, Indications Identified During Reactor Vessel Head Inspection	16 June 2023	Beaver Valley	Indications Identified During Reactor Vessel Head Inspection	Large early release frequency Stress corrosion cracking
ML23129A312	9 May 2023	Beaver Valley	NRR E-mail Capture - Beaver Valley Unit 2 - Verbal Authorization of Alternative Request, 2-TYP-4-RV-06	Liquid penetrant
ML23125A061	8 May 2023	Quad Cities	Proposed Alternative to the Requirements of the ASME Code	Unidentified leakage
ML23125A160	5 May 2023	Beaver Valley	NRR E-mail Capture - Correction to Beaver Valley - RAI Regarding Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations	Liquid penetrant
L-23-129, Response to Request for Additional Information for 10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations	5 May 2023	Beaver Valley	Response to Request for Additional Information for 10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations	Stress corrosion cracking Liquid penetrant
ML23125A146	5 May 2023	Beaver Valley	NRR E-mail Capture - Beaver Valley - RAI Regarding Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations	Liquid penetrant
ML23118A312	28 April 2023	Quad Cities	Response to Request for Additional Information for Quad Cities Relief Request I6R-11, Proposed Alternatives for a Temper Bead Weld Repair of the Mating Surfaces of the Reactor Pressure Vessel Head and Shell	Nondestructive Examination
ML23118A165	28 April 2023	Quad Cities	NRR E-mail Capture - Request for Additional Information Quad Cities, Unit 2, Alternative Request I6R-11	Nondestructive Examination
ML23118A381	28 April 2023	Beaver Valley	10 CFR 50.55a Request 2-TYP-4-RV-06 for Alternative Repair Methods for Reactor Pressure Vessel Head Penetrations	Weld Overlay Coatings Nondestructive Examination Intergranular Stress Corrosion Cracking Liquid penetrant Dissimilar Metal Weld
ML23114A378	24 April 2023	Quad Cities	Submittal of Sixth Inservice Inspection Interval Relief Request I6R-11 Proposed Alternatives for a Temper Bead Weld Repair of the Mating Surfaces of the Reactor Pressure Vessel Head and Shell Flanges	Non-Destructive Examination Weld Overlay Coatings Nondestructive Examination Intergranular Stress Corrosion Cracking Dissimilar Metal Weld Unidentified leakage
ML23090A130	31 March 2023	Nine Mile Point	Verbal Authorization for Relief Request I5R-11, Proposed Alternative Repair of Recirculation Inlet Nozzle N2E Dissimilar Metal Weld	Weld Overlay Dissimilar Metal Weld DM weld
NMP1L3519, Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	30 March 2023	Nine Mile Point	Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	Non-Destructive Examination Weld Overlay Coatings Nondestructive Examination VT-2 Intergranular Stress Corrosion Cracking Stress corrosion cracking Eddy Current Testing Liquid penetrant Through-Wall Leakage Dissimilar Metal Weld DM weld
NMP1L3516, Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	29 March 2023	Nine Mile Point	Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	Non-Destructive Examination Weld Overlay Coatings Nondestructive Examination VT-2 Intergranular Stress Corrosion Cracking Stress corrosion cracking Eddy Current Testing Liquid penetrant Through-Wall Leakage Dissimilar Metal Weld DM weld
NMP1L3515, Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	27 March 2023	Nine Mile Point	Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	Weld Overlay Stress corrosion cracking Dissimilar Metal Weld
NMP1L3513, Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	24 March 2023	Nine Mile Point	Submittal of Emergency Relief Request I5R-11 Concerning the Installation of a Weld Overlay on Reactor Pressure Vessel Recirculation Inlet Nozzle N2E Safe End-to-Nozzle Dissimilar Metal Weld (32-WD-208)	Weld Overlay Coatings Nondestructive Examination VT-2 Intergranular Stress Corrosion Cracking Stress corrosion cracking Liquid penetrant Through-Wall Leakage Dissimilar Metal Weld DM weld
ML23088A217	31 December 2022	Arkansas Nuclear	Relief Request for Half-Nozzle Repair of Reactor Vessel Closure Head Penetration 46 - Technical Report, ANP-4023NP, Revision 0, December 2022	Boric Acid Nondestructive Examination Stress corrosion cracking Liquid penetrant
ML22094A001	15 April 2022	Dresden Peach Bottom Nine Mile Point Limerick Clinton Quad Cities FitzPatrick LaSalle	Constellation Energy Generation, LLC - Proposed Alternative for Repair of Water Level Instrumentation Partial Penetration Nozzles (Epids L-2021-LLR-0057 and L-2021-LLR-0058)	Nondestructive Examination VT-2 Incorporated by reference Intergranular Stress Corrosion Cracking Stress corrosion cracking Through-Wall Leakage
ML22073A095	7 April 2022	Arkansas Nuclear	Approval of Request for Alternative from Certain Requirements of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code (EPID L-2021-LLR-0084) (NON-PROPRIETARY)	Nondestructive Examination Finite Element Analysis Stress corrosion cracking Liquid penetrant

ASME Code Case N-638-10

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