ML14084A136

From kanterella
Jump to navigation Jump to search

NRR E-mail Capture - Callaway I3R-16 Phoncon
ML14084A136
Person / Time
Site: Callaway Ameren icon.png
Issue date: 03/25/2014
From: Lyon F
Plant Licensing Branch IV
To: Pat Purtscher
NRC/NRR/DE/EVIB
References
MF3650
Download: ML14084A136 (2)


Text

NRR-PMDAPEm Resource From: Lyon, Fred Sent: Tuesday, March 25, 2014 6:32 AM To: Purtscher, Patrick Cc: Fairbanks, Carolyn

Subject:

Callaway I3R-16 Phoncon (TAC No. MF3650)

The NRC staff obtained clarifying information regarding the licensees request for relief I3R-16 (ADAMS Accession No. ML14079A529), dated 3/19/14, during a phoncon with the licensee on 3/24/14. The following staff were on the call.

NRC:

Patrick Purtscher, DE/EVIB Fred Lyon, DORL/LPL4-1 Ameren Missouri:

Scott Maglio, Manager - Regulatory Affairs Tom Elwood, Supervising Engineer - Regulatory Affairs and Licensing Mike Hoehn, Supervising Engineer, Engineering Programs Jeff Imhoff, Principal Engineer (Mechanical Systems)

Nikki Green, Consulting Engineer (Mechanical Design)

The licensee informed the NRC staff that:

  • The accuracy of their UT instrument is 1/4 inch. Therefore, they assumed a bounding flaw size of 1/2 inch when calculating the maximum leak rate of 59.4 gpm (with pump at shutoff head and static head subtracted).
  • The current measured leak rate is about 1 drop per 40 seconds and was discovered during operator rounds when the operator observed a rust trail on the HX endbell. The UT was last performed on 3/17/14, and will be performed again in June and September.
  • The leakage limit is derived from the safety analysis for TS 3.7.9, UHS, which provides SR limits of greater than 831.25 feet MSL pond level and less than 90 degrees F pond temperature.

1

Hearing Identifier: NRR_PMDA Email Number: 1186 Mail Envelope Properties (Fred.Lyon@nrc.gov20140325063200)

Subject:

Callaway I3R-16 Phoncon (TAC No. MF3650)

Sent Date: 3/25/2014 6:32:28 AM Received Date: 3/25/2014 6:32:00 AM From: Lyon, Fred Created By: Fred.Lyon@nrc.gov Recipients:

"Fairbanks, Carolyn" <Carolyn.Fairbanks@nrc.gov>

Tracking Status: None "Purtscher, Patrick" <Patrick.Purtscher@nrc.gov>

Tracking Status: None Post Office:

Files Size Date & Time MESSAGE 1355 3/25/2014 6:32:00 AM Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received: