ML15272A676
| ML15272A676 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 09/29/2015 |
| From: | Richard Guzman Plant Licensing Branch 1 |
| To: | Craft W Dominion Nuclear Connecticut |
| Guzman R | |
| References | |
| Download: ML15272A676 (1) | |
Text
From:
Guzman, Richard Sent:
Tuesday, September 29, 2015 10:05 AM To:
Wanda D Craft (Generation - 6)
Subject:
RE: Amendment 262 for MPS3 RWST Temperature change LAR Follow Up Flag:
Follow up Flag Status:
Flagged
- Wanda, The staff has reviewed your 9/23/15 message and acknowledges that the containment structural design temperature value of 296°F on page 5 of the safety evaluation dated July 27, 2015 was indeed in error. As per FSAR Table 6.2-3, the liner design temperature is 280°F. The statement in question should be revised to read as follows:
The containment maximum and minimum internal design pressure is 45 psig
[pounds per square inch gauge] and 8.00 psia respectively, and the structural design temperature of the containment liner is 280°F.
Please consider this e-mail as documentation of the error as stated above. This communication will be added to ADAMS as an official agency record.
- Thanks,
~~~~~~~~~~~
Rich Guzman Sr. Project Manager NRR/DORL US NRC 301-415-1030 From: Wanda D Craft (Generation - 6) [1]
Sent: Wednesday, September 23, 2015 3:52 PM To: Guzman, Richard
Subject:
[External_Sender] Amendment 262 for MPS3 RWST Temperature change LAR
- Rich, As we discussed, during review of Amendment 262 related to the MPS3 RWST Temperature Change dated July 27, 2015, DNC noted a value for the containment structural design temperature that may be of concern. The first full sentence on page 5 of the SE states, The containment maximum and minimum internal design pressure is 45 psig [pounds per square inch gauge] and 8.00 psia respectively, and its structural design temperature is 296°F. The concern is the 296°F value. DNC has reviewed the LAR and associated RAIs and the stretch power uprate submittal and did not find a reference to this value.
Does the 296°F value refer to the containment liner temperature? The calculations of containment liner temperatures in the MPS steam line break and LOCA containment analyses do not exceed 296°F.
The containment liner temperature listed in the FSAR is 280°F. Either value for a liner temperature is acceptable for consistency with the results of the steam line break and LOCA containment analyses.
However, the containment vapor temperature is approx. 350°F for the steam line break, which is used to define the EEQ profile. Please explain the 296°F value.
If you have any questions, please let me know. Thanks.
Wanda D. Craft Nuclear Licensing and Operations Support Dominion Resources Services, Inc (804) 273-4687 tie-line 730-4687 CONFIDENTIALITY NOTICE: This electronic message contains information which may be legally confidential and or privileged and does not in any case represent a firm ENERGY COMMODITY bid or offer relating thereto which binds the sender without an additional express written confirmation to that effect. The information is intended solely for the individual or entity named above and access by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution, or use of the contents of this information is prohibited and may be unlawful. If you have received this electronic transmission in error, please reply immediately to the sender that you have received the message in error, and delete it. Thank you.