ML20044B520
| ML20044B520 | |
| Person / Time | |
|---|---|
| Issue date: | 06/10/1992 |
| From: | Rosalyn Jones Office of Nuclear Reactor Regulation |
| To: | Taylor J BABCOCK & WILCOX CO. |
| References | |
| NUDOCS 9206240246 | |
| Download: ML20044B520 (2) | |
Text
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June 10, 1992 Mr. J. H. Taylor, Manager l
Licensing Services
\\
l B&W Nuclear Technologies i
3315 Old Forest Road P.
O. Box 10935 Lynchburg, VA 24506-0935
Dear Mr. Taylor:
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDIN TO BAW-10156-A, "LYNXT, CORE TRANSIENT THERMAL-HYDRAULIC i
PROGRAM" On March 12, 1991, - you submitted Revision 1 to LYNXT Topical
- Report, BAW-10156-A, "LYNXT Core Transient Thermal-Hydraulic Program."
During the course o,f our review, several questions have been generated, and are enclosed.
please contact Dan O'Neal at Should you have any questions, (301)504-2880.
1 Sincerely, 4
/s/
i Robert C.
Jones, Chief Reactor Systems Branch Division of Systems Technology
Enclosure:
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.I QUESTIONS CONCERNING PEVISION 1 TO EAW-10156-4 LYNXT. CCRE TRANSIENT THERMAL-ntDRAULIC CROGRAM"
" ARCH 1941 I
c As acolleo to the PV Imolicit Numerical' Solution. Crossflow' carameters are moceled with either the conor cell method or tne transverse scaling method. and tne axial 1 low carameters are mocelea cni v wi tn the donor cell metnoo.
Is this correct?
Z.
In the crevious review of the original LYNXT. a cuestion nac accresseo the unonvs2 cal effects at transverse scalino cuestion 14 on 2.
E-ZS. E-27 of the YNXT Rev. 1 Toolcal
-ecorts.
With reverence to this cuestion. olease clarify the
- se et transverse scalina in eo. 2 7
- on o.
- -30 for flows sucn as reverse
- low anc recirculation t iew wnen tne crcsstlow l
is more sioniticant than in the uorlow case.
i 4
i e
lease provice an inoication of new scenarios that L fNXT Rev.
.n a y oe e oectec to ce acclied to now that the PV Imolicit
<umericai Eolution nas been acced to tne coce.
Also. witn ecarc to tne crevious review of the original L(NXT tauestion 4 on cage E-3 oT ine tyNXT Aev.
1 Toolcal Reporti, nave the tvolcal ranges or transients to be an a l v ::ed changeo?
i d
r 4
Please crovide inf ormation to demonstrate the ability of LYNxT Cev.
1 to mocel low, reverse. anc recirculatino flows.
5.
Please orovice the limi ta tions and restrictions olacea on low, reverse, and recirculating flows moceleo oy LYNXT Rev.
1.
o.
The critical heat flux for the reverse and recrculating flow cases will be cifferent from the uoflow case.
How does LYNXT i
Oev. I hancle this?
t
+
t 5
I I
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