ML26013A033

Enclosure 1 - A3 Technical Specifications

ML26013A033
Person / Time
Site:	07201042
Issue date:	02/06/2026
From:	Storage and Transportation Licensing Branch
To:
Shared Package
ML26013A031	List: ML26013A032 ML26013A033 ML26013A034
References
CAC 001028, EPID L-2025-LLA-0144
Download: ML26013A033 (0)

Text

ENCLOSURE 1 REVISED TABLE NUMBER UNDER ASME CODE SECTION/ARTICLE NB-5520 CORRECTED TECHNICAL SPECIFICATIONS FOR COC NO. 1042 AMENDMENT NO. 3

EOS System Amendment 3 Technical Specifications 4-6 4.0 Design Features (continued)

EOS-37PTH and EOS-89BTH DSC ASME Code Alternatives, Subsection NB (continued)

REFERENCE ASME CODE SECTION/ARTICLE CODE REQUIREMENT JUSTIFICATION AND COMPENSATORY MEASURES NB-4243 and NB-5230 Category C weld joints in vessels and similar weld joints in other components shall be full penetration joints.

These welds shall be examined by UT or radiographic testing (RT) and either PT or magnetic particle testing (MT).

The shell to the outer top cover plate (OTCP) weld, the shell to the inner top cover weld, and the drain port cover and vent port plug welds are all partial penetration welds. The cover-to-shell welds are designed to meet the guidance provided in NUREG-1536, Revision 1 for the stress reduction factor.

Nondestructive examination (NDE) is done by qualified personnel, in accordance with Section V and the acceptance standards of Section III, Subsection NB-5000, except as noted for OTCP weld option 2 ultrasonic examination.

As an alternative to the NDE requirements of NB-5230 for Category C welds, all of these closure welds will be multi-layer welds and receive a root and final PT examination, except for the shell to the OTCP weld.

OTCP weld option 1 The shell to OTCP weld will be a multi-layer weld and receive multi-level PT examination in accordance with the guidance provided in NUREG 1536 Revision 1 for NDE. The multi-level PT examination provides reasonable assurance that flaws of interest will be identified.

OTCP weld option 2 The shell to the outer top cover plate weld will be examined by UT.

NB-5330 Ultrasonic Acceptance Standards The UT acceptance criteria for OTCP weld option 2 are:

1. Rounded flaws are evaluated by the acceptance criteria of NB-5331(a).

2. Planar flaws are allowable up to the limit (W - hi)

D at any location, where hi is the sum of the depth of aligned planar defects, W is the measured weld thickness, and D is the minimum weld depth required by NB-3000.

3. Planar flaws that penetrate the surface of the weld are not allowable.

NB-5520 NDE Personnel must be qualified to the 2006 edition of SNT-TC-1A Permit use of the Recommended Practice SNT-TC-1A up to the edition as cited in Table NCA-7100-2 of the latest ASME Code edition listed in 10 CFR 50.55a at the time of construction.

(continued)