ML20300A209

TS 5.6.7 Reporting Template Industry Draft

ML20300A209
Person / Time
Issue date:	10/23/2020
From:	Steven Bloom, Priyam Talukdar Office of Nuclear Reactor Regulation
To:
Terry L, 301-415-1167
Shared Package
ML20300A215	List: ML20300A209 ML20314A054
References
Download: ML20300A209 (2)

Text

Section 5.6.7, Steam Generator Tube Inspection Report, of TSTF577 requires some information noted below.

Additional information will be added as noted to provide a better description of the general state of the steam generators.

a) Background information (Not required by TSTF-577)

1) Steam generator design overview (e.g., model, tube material, SG schematic w/o dimensions, number of tubes, nominal tube diameter and wall thickness, style of support plate).

2) The outage the prior (N-1) SG inspections were completed.

3) The effective full power months of operation since the prior SG inspection.

4) Date of entry into Mode 4 from current inspection outage

5) The SG primary-to-secondary leak rate observed since the last inspection and how it trended with time.

6) Nominal hot-leg temperature(s) (THOT) during the prior inspection period.

7) Tube sub-populations with increased degradation susceptibility (e.g., tubes with potential high residual stress (- two sigma), other areas based on growth rates or design features). - Section 5.6.7.b plus additional information per staff request

8) A list of any deviations taken from Mandatory and/or Needed (Shall) requirements important to tube integrity from the EPRI Guidelines referenced by NEI 97-06 since the last inspection.

b) Inspections Performed:

1) The scope of primary side inspections performed on each SG and if applicable, a discussion of the reason for scope expansion. - Section 5.6.7.a.

2) The NDE techniques used for each degradation mechanism found. - Section 5.6.7.b and Section 5.6.7.c.1

3) A listing of all degradation mechanisms found - Section 5.6.7.c.2

4) The location, orientation (if linear), measured size (if available), and voltage responses of each indication. For tube wear at support structures less than 20 percent through-wall, only the total number of indications needs to be reported - Section 5.6.7.c.3

5) The location of each tube plugged [or repaired] during the inspection outage, and the reason each tube was plugged. - Section 5.6.7.c.4

6) The number and percentage of tubes plugged [or repaired] to date, and the effective plugging percentage (if applicable) in each SG. Section 5.6.7.e

7) The scope and results of secondary-side inspections performed in each SG. - Section 5.6.7.f

8) The number, type, and location (if available) of loose parts removed or left in service in each SG. - Staff request

9) The scope, method, and results of secondary-side cleaning performed in each SG.

10) The results of primary side component visual inspections performed in each SG c) A condition monitoring summary:

1) Any degradation that was not bounded by the prior operational assessment in terms of projected maximum flaw dimensions, minimum burst strength, and/or accident induced leak rate. Section 5.6.7.c.3

2) The limiting indication of each degradation mechanism compared to the condition monitoring limit, including analytical methodology used to demonstrate condition monitoring limits were met.- Section 5.6.7.c.3

3) The results from any in-situ pressure testing and tube pulls, if applicable.

d) An operational assessment (OA) summary:

1) The effective full power months of operation permitted for the current operational assessment along with the limiting degradation mechanism(s).

2) A summary of the operational assessment methodology (e.g., Arithmetic, Statistical, or fully probabilistic) and results for each degradation mechanism. - Section 5.6.7.d

3) Predicted margin relative to the applicable end of cycle acceptance criteria - Section 5.6.7.d