ML22024A008
| ML22024A008 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 01/20/2022 |
| From: | Angela Wu NRC/NRR/DNRL/NLRP |
| To: | |
| Wu A, 301-415-2995 | |
| Shared Package | |
| ML22024A002 | List:
|
| References | |
| Download: ML22024A008 (4) | |
Text
Oconee SLRA: Breakout Questions SLRA Section AMP: Water Chemistry TRP: 2
Question SLRA SLRA Background / Issue Discussion Question / Request Number Section Page (As applicable/needed) 1 B2.1.2 B-30 The SLRA AMP description for Please clarify if there are no NUREG -2191 Consistency of the enhancements to the Water Water Chemistry program (B2.1.2) Chemistry program or describe SLR-ONS - description refers to enhancements the enhancements.
AMPR - described below, but no XI.M2, enhancements or exceptions are Water identified in that section or in Table B 2 -
Chemistry 1.
AMP Evaluation Document SLR-ONS - AMPR - XI. M2 Report follows the same pattern. The AMP (GALL -SLR description in Appendix B refers to Program enhancements, but Sections 3.4 and XI.M2, Rev. 3.5 state there ar e no exceptions or 1 enhancements.
2 CSD -CP - 34 of The Action Level 2 condition for Please clarify the Oconee ONS-0002, 50 Oconee appears to require a return Action Level 2 requirements Rev. 1, from the condition within 100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />, and describe and provide the Oconee Section and if this is not achieved then an basis for any differences Secondary 6.2.2 additional 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> s to be in in the between the Oconee and EPRI Water reactor-not-critical condition. Action Level 2 requirements.
Chemistry Strategic In the EPRI Secondary Water Plan Chemistry G uidelines, the Action Level 2 condition requires ((XX )).
3 3.1 3 - 202 The following component, material, and Please clarify the application of environment combinations in these the combinations identified.
Table steam generator aging management Specifically, 3.1.2-4 evaluations are not clear to the staff:
- 1. Tube Support Plate Assembly 1.a. Describe the treated water (support rods), stainless steel environment and a) In Treated Water (External) conditions for the support b) In Treated Water (Internal) rods that are different from secondary
- 2. Tube Support Plate Assembly (tube feedwater.
support plates), stainless steel 1.b. Explain what internal a) In Treated Water (Internal) environment means for the support rods.
- 3. Tubesheet, steel with nickel alloy cladding 2.a. Explain the meaning of a) Air - Indoor Uncontrolled (External) internal environment for b) Air with Borated Water Leakage the tube support plates (External) and describe the treated c) Reactor Coolant (Internal) water environment and conditions that are
a) Reactor Coolant (Internal) b) Secondary Feedwater (External) 3.a. Describe the indoor uncontrolled external environment and location for the nickel alloy clad SG tubesheet.
3.b. Describe the lo cation of the air with borated water leakage external environment for the nickel alloy clad SG tubesheet.
3.c. Describe the location of the internal environment for the nickel alloy clad SG tubesheet.
4.a. Describe the location of the internal environment for the SG tube-to-tubesheet welds.
4.b. Describe the location of the external environment where the SG tube-to-tubesheet welds are exposed to secondary feedwater.
4 AD-CP-ALL-4 of 10 Definitions 1, 2, and 3, related to Please discuss whether these 0011, Rev chemistry analysis, appear to have definitions of concentration in 0, Startup errors or differ from standard chemistry Startup Chemistry Program Chemistry definitions (using solute where differ from the way they are Program solvent or solution w ould typically be defined for the EPRI water used ): chemistry guidelines. If there Section 3.0 are differences, please discuss
- 1. cc/kg is defined in Startup the implications for the Oconee Chemistry Program as a volume of Water Chemistry program.
hydrogen gas to mass of solute, with hydrogen and water being used in the example. However, based on standard chemical definitions, in this example hydrogen would be the solute and water would be the solvent.
- 2. Similarly, ppb is defined in the procedure as the amount of analyte to solute. In this case the analyte (e.g. sodium) would also be a solute, and water is the solvent.
- 3. The same comments apply to the definition of ppm.
5 Section 3.1 3-110 The staff notes that SLRA Table 1 Item Please clarify how aging to 3-3.1.1-087 (GALL-SLR Item IV.B4.RP -management addresses loss 133 24) is associated in Table 3.1.2-2 with of material due to pitting or specific reactor internals components. crevice corrosion for all Table However, this GALL item is intended to stainless steel and nickel alloy 3.1.2-2 address loss of material due to pitting reactor internals using the or crevice corrosion for all stainless Water Chemistry program, steel and nickel alloy reactor internals considering Item 3.1.1-087 is using the Water Chemistry associated only with specified program. These aging mechanisms primary or expansion category are not addressed by MRP-227 and internal components in SLRA XI.M16A. In addition, associating Item Table 3.1.2-2. This approach 3.1.1 -087 with specific reactor internals does not cover the no components in Table 3.1.2-2 means it additional measures does not address pitting or crevice components in MRP-227.
corrosion for the other reactor internals components.