ML20028F950
| ML20028F950 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 02/03/1983 |
| From: | Zimmerman S CAROLINA POWER & LIGHT CO. |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| References | |
| RTR-NUREG-0737, RTR-NUREG-737, TASK-2.E.4.2, TASK-TM LAP-83-03, LAP-83-3, NUDOCS 8302070208 | |
| Download: ML20028F950 (4) | |
Text
'
e CD&L Carohan Power & Light Cornny FEB U21983 LAP-83-03 Director of Nuc lear Reactor Regulation Attention:
Mr.
D. 11 Varaallo, Chief Operating Reac tors liranch No. 2 Division of Licensing United States Nuclear Regulatory Commission Washington, DC 20555 IIRUNSWICK STEAM ELECTRIC PLANT, UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324 LICENSE NOS. DPR-71 AND DPR-62 NUREG-0737 ITEM II.E.4. 2. 7 CONTAINMENT ISOLATION DEPENDAlllLITY
Dear Mr. Vassallo:
Ca roli na Powe r & Light Company (CP&L) has reviewed your November 3, 19d2 letter relating to NUREG-0737 Item II.E.4. 2, Containment luolation Dependability, for the lirunswick Steam Elec tric Plant (IISEP). Your letter notes that Brunswick satisfies Ac tion It ein II.E.4. 2. 7, which requires that containment purge and vent isolation valves close on a high radiation signal and that the radiation detectors sense primary containment atmosphere.
Our review indicates that the radiation detectors sense secondary containment atmosphere, not primary containmoint atmospliere, as discussed in your letter and, theref ore, do not provide the f unction specifically as you described.
Accordingly, CP&L has completed the plant specific calculations f or Ac t ion item II.E.4.2.7 utilizing the calculation instruction guide provided to t he u t ili t ies by t he llWR Owne rs ' Group (llWROG) and the generic analysis method submitted by letter dated June 14, 1982 from Mr. T. J.
Dente (llWROG) to Mr. D. G.
Eisenhut.
'lhe calculations yielded a site boundary thyroid done at ten minutes after event initiation of 0.386 Rem.
The maximum dose possible anstuning release of the flash f raction percentage of all reac tor coci.ut todine inventory is 1.8 Rem.
The calculations applied the generic model assiunptions utilizing plant-specific values where appropriate. At t aciunent 1 provides the lirunswick plant-specific values employed.
Since the calculated site boundary dose is lean than the 5 Rem EPA Protec tive Ac tion Guideline, CP&L believes the installation of a automatic isolation feature for purge valves on high containment radiation is not warranted. We believe the analytical work we have performed demonstrates that our current isolation provisions comply with the intent of the requirement and 0302070200 830103 PDR ADOCK 05000324 L
P PDR 411 Fayettevule Street
- P. O Box 1551
- Raleigh, N C. 27602 L
I l
D. B. Vassallo '
l demonstrates that the concern which promulgated the requirement is not valid for the Brunswick Plant. 'therefore, CP&L does not plan to provide automatic isolation provisions as called for under NUREC-0737 Item 11. E. 4. 2, i
position 7.
Our calculations are on file at Brunswick in the TML Project Closcout file for NRC Inspection and Enforcement review (File No. 20002.8).
We believe this submittal satisfies the intent of the requirement and completes our action for this item.
a i
Should you have any questions on this subject, please contact our staff.
t I
Yours very truly,
4 m.,
S.
immerman Manager Liceneing & Permits P
WRM/ mag (6102C11T2)
Enc losure cc:
Mr. D. O. Mye rs (NRC-BSEP)
Mr. J.
P. O'Reilly ( NRC-RII)
Mr. S. D. Mac Kay (NRC) i l
1
~..
ATTACitMENT 1 a,:
Technical speci fication coolant specific activity (speci fic g
activity of primary coolant water assumed equal) 0.2 uti/gm - l )y y
A:
Activity release rate 26.42 Ci/hr A:
I dine inventory due to depressurization spiking D
1831 Cl A:
Total iodine inventory in reactor o
1881 Cl M:
Total mass of reactor coolant g
5 5 5 x 10 lb, N:
Number of fuel bundles B
i 560 l
l q:
Volumetric flow rate 122410 cfm O:
Break flow rate b
2129 GPM X/Q:
Atnospheric dispersion factor
-6 Sec/ 3 5.0 x 10 3 - ground release 5.1 x 10-8 sec/g3 - 100m stack release Activity removal rate time constant 1.438 h r
ATTACHMENT 1 (Cont'd)
PIPING DATA Purge Supply:
d.
Pipe diameter 24 in equivalent e.
Pipe length 109'-6&"
2:
Elevation of piping 15'-3" - Intake (average) 20' - release K,: Total purge supply resistance coefficient p
2.123 (24" equivalent)
Purge Exhaust:
d:
Pipe diameter 24 in equivalent c:
Pipe length 1281'-8" Z:
Elevation of piping 38'-5" - Intake (average) 328' - release p ; Total purge exhaust resistance coefficient K
11 92 (24" equivalent) l
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