ML14349A789

NRR E-mail Capture - Slides for 12/02/14 Meeting on L*

ML14349A789
Person / Time
Site:	South Texas
Issue date:	12/02/2014
From:	Kee E - No Known Affiliation
To:	Stang J Division of Operating Reactor Licensing
References
TAC MF2400, TAC MF2401
Download: ML14349A789 (10)

Text

NRR-PMDAPEm Resource From: Ernie Kee [erniekee@gmail.com]

Sent: Tuesday, December 02, 2014 8:31 AM To: Stang, John Cc: Harrison Albon; Drew Richards; Singal, Balwant

Subject:

Slides for 12/02/14 meeting on L*

Attachments: JL L-Star Procedure.pptx

John, Please find slides attached as requested.

Ernie Kee 1

Hearing Identifier: NRR_PMDA Email Number: 1757 Mail Envelope Properties (9881DC7C-AC18-4E51-A497-9ACD27F55D88)

Subject:

Slides for 12/02/14 meeting on L*

Sent Date: 12/2/2014 8:31:25 AM Received Date: 12/2/2014 8:31:23 AM From: Ernie Kee Created By: erniekee@gmail.com Recipients:

"Harrison Albon" <awharrison@STPEGS.COM>

Tracking Status: None "Drew Richards" <amrichards@stpegs.com>

Tracking Status: None "Singal, Balwant" <Balwant.Singal@nrc.gov>

Tracking Status: None "Stang, John" <John.Stang@nrc.gov>

Tracking Status: None Post Office: gmail.com Files Size Date & Time MESSAGE 73 12/2/2014 8:31:23 AM JL L-Star Procedure.pptx 63067 Options Priority: Standard Return Notification: No Reply Requested: No Sensitivity: Normal Expiration Date:

Recipients Received:

L* Test Procedure and Application December 2, 2014 Nuclear Regulatory Commission Rockville, MD

Generate Additional LL* Data 10 Hypothetical Trends 9

8 Focus of Testingg 7 (0 to 210 g/m2) 6 CH HL (ft) 5 4

3 2

STP strainer test data 1 Correlation 0

0 500 1000 1500 2000 2500 3000 L* (g/m2)

• July test used 30-day WCAP inventories with full spray, max fiber, etc.

• Focus batch resolution on low concentrations

• Check L* envelopep with alternate conventional beds

• Calibrate reasonable uncertainty for application to total head loss

Test Considerations

• Incremental chemical addition

- provides desired head-loss response regardless of release rate (WCAP 16530, UNM, conditions, etc.)

- Release rate model sets max inventory of interest

- 1 to 2 pool turn over between additions

• Finite test duration

- Meet objectives in ~2 days of chemical addition

- Add resolution ((timed batches)) near concentrations of special interest

- Maximum resolution practical (more small additions)

Key Concentrations of Interest UNM 15-in UNM WCAP max break max 30 6.5-hr 6.5 hr spray history day Chemical Heaad Loss spray Change in bed response (15 in break history) 35 110 134 210 g/m2

• Incremental additions p planned near concentration points

Batch Addition Strategy

• Available time (48 hr) divided by turn over interval equals max number of adds (Nadd)

• Max L* divided by Nadd equals mass per add

• More frequent small adds near interest points if possible ibl

- Flexibility to collapse concentration intervals to assure distinct di i response ffor each h addition ddi i

• Assume 3 trains of strainer area for L* values

Max Precipitate Generation Assumptions

• 20-in 20 in break temperature profile

• pH curve (min, max)

• Aluminum l i exposure

- 5000 ft2 vapor space and 500 ft2 submerged

• Fiberglass

- 2385 ft3, 218 ft3 (15-in break)

• Concrete

Aluminum and Calcium

• Two Aluminum Limits

• WCAP-16530 Calcium WCAP total WCAP total UNM 2 to 3x 24 hr 30 day 30 day time time

• Two Possible Precipitate Calculations

• WCAP Al + WCAP Ca

• Modified UNM Al + WCAP Ca

LL* Application

• Standard WCAP or modified WCAP used to calculate time-dependent cumulative release of Al and Ca (now reasonable rate is a key)

• Release becomes precipitate with no solubility or saturation delay => M(t) in pool

• Mass distributed to strainers depending on active flow

• Chemical head loss for each strainer read from test correlation