ML19345B730
| ML19345B730 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 11/26/1980 |
| From: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8012020432 | |
| Download: ML19345B730 (3) | |
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B ALTIMORE G AS AN D ELECTRIC COM P ANY P.O. D O X 1475 U A LTI M O R E. MAHYLAND 21203 A n t n u s C t.U N OV A LL, Ja.
v.a ret,.. :. v.s November 26, M80 s.<.
e 9
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Of fice of Nuclear ReacYor Regulation U. S. Nuclear Regulatory Cornmission 9
Washington, D. C. 20555 ATTENTION:
Mr. R. A. Clark, Chief t;
, Operating Reactors Branch //3 e
pj Division of Licensing Eb C'
-M l".
SUBJECT:
Calvert Clif fs Nuclear Power Plant i
Unit No.1, Docket No. 50-317 d
Arnendrnent to Operating License DPR-53 g
Fif th Cycle License Application
,I[
Responses to NRC Staff Questions e.
G entjemen:.
Enclosed are our reponses to questions posed by NRC staf f on the subject application.
Very truly yours, BALTIMORE GAS AND eld TRIC COMPANY
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('}' ' A. E. Lundva,II, Jr.
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Vice President - Supply AEL/WJL/rnit Copy To:
- 3. A. Biddison, Esquire (w/out Encl.)
G. F. Trow bridge, Esquire (w/out Encl.)
Messrs.
E. L. Conuer, Jr., NRC P. W. Kruse, CE F012020@A
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ENCLOSURE I
QUESTION Provide a list of the assumptions applicable to dose rate calculations of the Seized Rotor Event.
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RESPONSE
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- 1) During first 1800 sec there is no operator action.
- Thus, bypass valve dump to the condenser and dump valves to atmosphere.
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- 2) Beyond 1800 seconds steam dump is to condenser via operator action.
- 3) Primary activity released to secondary assumed to be released without mixing within the S.G. secondary liquid.
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- 4) Primary to secondary leak rate.*
1 GPM 5)
Initial Reactor Coolant System Maximum Allowable Tech Spec Concentration * (DEQ 1-131) 1.0uC 1 gm l
6)
Initial Steam Generator Maximum Allowable i
Concentration (DEQ-131)*
0.1 uC 1 i
gm
- 7) Reactor Coolant System Maximum Allowable Concentration of Noble Gases (DEQ-133)*
100/E 4
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- 8) Partition Factor for Primary Release Through Atmospheric Dumps-1.0 4
- 9) Partition. Factor for Secondary Steam Release Through Atmospheric Dump 0.1
- Tech Soec. Limits-
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Enclosure Page 2 10)
Feed' Pump Turbine' Air Ejector Partition Factor
.0005 3
- 11) Atmospheric Dispersion Coefficient 1.8 X 10~4 sec/m i
3
- 12) Breathing Rate 3.47 X 10- m /sec 6
13)
Dose Conversion Factor-(I-131) 1.486 X 10 REM /C y
- 14) All Activity in the Gap is Assumed to be 4
Released to the Coolant 15)
STEAM REl. EASES i
Steam Release Point Approximate Amount of Steam Release Dump Valves (0-1800 sec) 55130 lbm l
Bypass to' Turbine (0-1800 sec) 12265 lbm Bypass to Turbine (1800-7200 sec) 53200 lbm Primary to Secondary Mass Transfer (0-7200sec) s1000 lbm 1
Thyroid Dose = 3.60 REM (2 hr) j j
Whole Body Dose = 0.4 REM.(2 hr) i i
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