ML12268A158

IR 1320140; B2F26 CC Low Flow to 2A and 2D RCP Thermal Barrier HXs

ML12268A158
Person / Time
Site:	Byron
Issue date:	01/30/2012
From:	Exelon Generation Co
To:	NRC/RGN-III
References
FOIA/PA-2012-0287
Download: ML12268A158 (2)

Text

AR 01320140 Report Aff Fac: Byron AR Type: CR Status: APPROVED Aff Unit: 02 Owed To: ACAPALL Due Date: 02/29/2012 Aff System: CC Event Date: 01/30/2012 CR 4/D Disc Date: 01/30/2012 LevellClass:

How H02 Orig Date: 01/30/2012 Discovered:

WR/PIMS Equip Tag:

AR:

Action Request Details

Subject:

CC LOW FLOW TO 2A AND 2D RCP THERMAL BARRIER HX'S

==

Description:==

Originator: Supv Contacted:

Condition

Description:

After the loss of offsite power and trip of U-2, the 2A and 2D RCP thermal barrier HX CC low flow alarms are in. Also, the RCP thermal barrier CC water flow low alarm Is in. Checked RCP thermal barrier CC water flow in the field and verified the total flow was in fact low at 142 gpm (low alarm at 150 gpm). There are currently 2 CC pumps running on U-2 so the flow should be high. This may indicate a blockage to the 2A and 2D thermal barrier HX. This could be a startup Issue.

Immediate actions taken:

Notified SM and OCC. Wrote IR.

Recommended Actions:

Validate actual flows and repair if necessary during the forced outage.

Operable Basis:

Reportable Basis:

Functionality Basis:

Assignments Assign #: Ol1 Assigned Status: AWA[I'/C To:

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Aff Fac: Byron Prim Grp: ACAPALL Due Date: 02/04/2012 Assign Type: TRKG Sec Grp: Orig Due Date:

Priority:

Schedule Ref:

Unit Condition:

Subject/Description: CC LOW FLOW TO 2A AND 2D RCP THERMAL BARRIER HX'S"