ML20214U209
| ML20214U209 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 11/24/1986 |
| From: | George Thomas PUBLIC SERVICE CO. OF NEW HAMPSHIRE |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| SBN-1244, NUDOCS 8612090183 | |
| Download: ML20214U209 (5) | |
Text
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6-Gen.fge S.Thotp Vice PretW Nuclect Pro u.*m PLd2c Service of New Hampshire New Hampshire Yankee Division November 24, 1986 SBN-1244 T.F. B7.1.2 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Dr. Thomas 2. Murley Regional Administrator
References:
(a) Facility Operating License No. NPF56, Docket No. 50-443 Subj ect: Radial Peaking Factor Limit Report
Dear Sir:
Enclosed please find the Radial Peaking Factor Limit Report. The subject report is required by Technical Specification 6.8.1.6.
Should you require additional information regarding this report, please contact Paul V. Gurney at (603) 474-9521, extension 4078.
Very truly yours, tn' h org( S. Thomas
Enclosure:
Radial Peaking Factor Limit Report cc: Director of Nuclear Reactor Regulation Attention: Chief, Reactor Systems Branch, DPL-A U. S. Nuclear Regulatory Commission Washington, D.C.
20555 Mr. A. C. Cerne NRC Senior Resident Inspector Seabrook Station Seabrook, NH 03874
[#y eg2o;ggg g%hbgga P
i P.O. Box 300. Seabrook, NH 03874. Telephone (603) 474 9574
N,<
Radial Peaking Factor Limit % t i
This Radial Peaking Factor Limit Report is ptwidad in accordance with Pary@ 6.8.1.6 of the seabrook Unit 1 Nuclear Plant Technical Specifications.
4 i
J The Fxy limits for RATED THERMAL POWER within specific core planes for Cycle 1 shall be:
F,RTP less than or equal to 1.71 for.all core planes containing 1.
l bank "D" control rods, and F,RTP less than or equal to 1.55 for all unrodded core planes.
2.
These Fxy(z) limits were used to confirm that the heat f1ux hot channel factor
]
Fg(z) will be limited to the Technical Specification values of:
Ff(z)3[
][K(z)]
for P > 0.5 and, l
F(z)$[4.64][K(z)]
for P $ 0.5 q
assuming the most limiting axial power distributions expected to result from I
the insertion and removal of Control Banks 3. C and D during operation, including I
the. accompanying variations in the axial xenon and power distributions as described in the " Power Distribution Control and Load Following Procedures", WCAP-8403 -
September, 1974. Therefore, these F limits provide assurance that the initial conditions assumed in the LOCA analys5s are met, along with the ECCS acceptance
~
i
~
criteria of 10CFR50.46.
See Figure 1 for a. plot of [Fg.PRel]vs.AxialCoreHeight.
1 l
1 i
i i
a
.o 2.5 Illll1II IIIIlllll (o.o. a.ss)
(4.0, s.ss) l e
=
=
n a
a
( to.a. 2. te f D
8 q
D I
2.
I i
(
\\
e
\\
=
i.s (ts.o. 1.51) s w
E I
D l
l 0,
o io in BOTTOM CORE HEIGHT (PT)
TOP FIGURE 1
T MAXIMUM F o. p REL VERSUS AXIAL CORE HEIGHT DURING NORMAL OPERATION L
"