ML26027A347
| ML26027A347 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 01/27/2026 |
| From: | Ameren Missouri, Union Electric Co |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML26027A333 | List: |
| References | |
| ULNRC-06970, LDCN 25-0022, TSTF-599-A, Rev 1 | |
| Download: ML26027A347 (0) | |
Text
Attachment 3 ULNRC-06970 Page 1 of 3 ATTACHMENT 3 MARKED-UP TS BASES PAGES (PROVIDED FOR IMFORMATION ONLY)
AC Sources - Operating B 3.8.1 BASES CALLAWAY PLANT B 3.8.1-29 Revision 19 SR 3.8.1.20 This Surveillance demonstrates that the DG starting independence has not been compromised. Also, this Surveillance demonstrates that each engine can achieve proper speed within the specified time when the DGs are started simultaneously.
The Surveillance Frequency is based on operating experience, equipment reliability, and plant risk and is controlled under the Surveillance Frequency Control Program.
This SR is modified by a Note. The reason for the Note is to minimize wear on the DG during testing. For the purpose of this testing, the DGs must be started from standby conditions, that is, with the engine coolant and oil continuously circulated and temperature maintained consistent with manufacturer recommendations.
SR 3.8.1.21 SR 3.8.1.21 is the performance of an ACTUATION LOGIC TEST for each Load Shedder and Emergency Load Sequencer train, except that the continuity check does not have to be performed, as explained in the Note.
The Surveillance Frequency is based on operating experience, equipment reliability, and plant risk and is controlled under the Surveillance Frequency Control Program.
REFERENCES 1.
10 CFR 50, Appendix A, GDC 17.
2.
FSAR, Chapter 8.
3.
Regulatory Guide 1.9, Rev. 3, July 1993.
4.
FSAR, Chapter 6.
5.
FSAR, Chapter 15.
6.
Regulatory Guide 1.93, Rev. 0, December 1974.
7.
Generic Letter 84-15, "Proposed Staff Actions to Improve and Maintain Diesel Generator Reliability," July 2, 1984.
8.
10 CFR 50, Appendix A, GDC 18.
9.
Regulatory Guide 1.108, Rev. 1, August 1977 (continued)
SURVEILLANCE REQUIREMENTS (continued)
ULNRC-06970 Page 2 of 3 Not Used.
AC Sources - Shutdown B 3.8.2 BASES CALLAWAY PLANT B 3.8.2-7 Revision 15 SR 3.8.2.1 (continued) 3, and 4. SR 3.8.1.12, SR 3.8.1.13, SR 3.8.1.17, SR 3.8.1.18 (LOCA load sequencer only), SR 3.8.1.19, and SR 3.8.1.21 (LOCA load sequencer only) are not required to be met because the capability to respond to a safety injection signal is not required to be demonstrated in MODE 5 or 6 or during movement of irradiated fuel assemblies. SR 3.8.1.20 is excepted because starting independence is not required with the DG that is not required to be operable.
This SR is modified by a Note. The reason for the Note is to preclude requiring the OPERABLE DG from being paralleled with the offsite power network or otherwise rendered inoperable during performance of SRs, and to preclude deenergizing a required 4160 V ESF bus or disconnecting a required offsite circuit during performance of SRs. With limited AC sources available, a single event could compromise both the required circuit and the DG. It is the intent that these SRs (SR 3.8.1.3, SR 3.8.1.10, SR 3.8.1.11, SR 3.8.1.14, SR 3.8.1.15, SR 3.8.1.16, and SR 3.8.1.18 (shutdown load sequencer only)) must still be capable of being met, but actual performance is not required during periods when the DG and offsite circuit is required to be OPERABLE. Refer to the corresponding Bases for LCO 3.8.1 for a discussion of each SR.
REFERENCES
- 1. FSAR, Section 3.1.2.
SURVEILLANCE REQUIREMENTS ULNRC-06970 Page 3 of 3