ML14349A789

From kanterella
Jump to navigation Jump to search

NRR E-mail Capture - Slides for 12/02/14 Meeting on L*
ML14349A789
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
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

1 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

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 Nuclear Regulatory Commission Rockville, MD

Generate Additional L* Data Generate Additional L Data 8

9 10 Hypothetical Trends Focus of Testing 5

6 7

8 HL (ft) g (0 to 210 g/m2) 2 3

4 CH STP strainer test data 0

1 0

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

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

Focus batch resolution on low concentrations Check L* envelope with alternate conventional beds p

Calibrate reasonable uncertainty for application to total head loss

Test Considerations 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

- Release rate model sets max inventory of interest

- 1 to 2 pool turn over between additions

  • Finite test duration 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 Key Concentrations of Interest WCAP max 6.5-hr spray UNM max 30 UNM 15-in break 6.5 hr spray max 30 day spray break history ad Loss emical Hea Change in bed response (15 in break history)

Ch

  • Incremental additions planned near 210 134 110 35 g/m2 p

concentration points

Batch Addition Strategy Batch Addition Strategy

  • Available time (48 hr) divided by turn over Available time (48 hr) divided by turn over interval equals max number of adds (Nadd)
  • Max L* divided by N equals mass per add
  • Max L* divided by Nadd equals mass per add
  • More frequent small adds near interest points if ibl if possible

- Flexibility to collapse concentration intervals to di i f

h ddi i assure distinct response for each addition

  • Assume 3 trains of strainer area for L* values

Max Precipitate Generation Assumptions

  • 20-in break temperature profile 20 in break temperature profile
  • pH curve (min, max) l i

- 5000 ft2 vapor space and 500 ft2 submerged

  • Fiberglass

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

  • Concrete

Aluminum and Calcium Aluminum and Calcium

  • WCAP-16530 Calcium WCAP total WCAP total 2 to 3x UNM time time 30 day 30 day 24 hr Two Possible Precipitate Calculations Two Possible Precipitate Calculations WCAP Al + WCAP Ca Modified UNM Al + WCAP Ca

L* Application L Application

  • Standard WCAP or modified WCAP used to 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