ML20008G201
| ML20008G201 | |
| Person / Time | |
|---|---|
| Site: | Bellefonte  |
| Issue date: | 06/18/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| REF-PT21-81-467-000 10CFR-050.55E, 10CFR-50.55E, PT21-81-467, PT21-81-467-000, NUDOCS 8107020435 | |
| Download: ML20008G201 (2) | |
Text
f
~
_t
._I
~
400 Chestnut Street Tower II June 18, 1 y'f
_,gg 0
"'&%~E
,e v
?/N ;fdH
~
s 6;.
M e.
JUL 011981
- 7.'
Mr. James P.
'Reilly, Director manAscal 11 Y
" ammua8" Office of Insp tion and Enforcement U.S. Nuclear Re atory Commission 6
p 4/)bl
(
Region II - Suite 100 101 Marietta Street Atlanta, Georgia 303
Dear Mr. O'Reilly:
BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 - STEAM PRESSURE REGULATOR MALFUNCTION - BLRD-50-438/81-38, BLRD-50-439/81 FIRST I!TfERIM REPORT The subject deficiency was initially repwted to NRC-OIE Inspector R. V. Crlenjak on May 19, 1981, in accordance with 10 CFR 50.55(e) as NCR BLN NEB 8105. Enclosed is our first interim report. We expect to submit our next report by September 30, 1981. We consider 10 CFR Part 21 to be applicable to this deficiency.
If you have any questions concerning this matter, please get in touch with D. L. Lambert at FIS 857-2581.
Very truly yours, l
TENNESSEE VALLEY AUTHORITY L. M. Mills, Manager Nuclear Regulation and Safaty l
Enclosure It'. Victor Stello, Jr., Director (Enclosure)[
ocs Office of Inspection and Enforcement U.S. Nuclear Reg'21atory Commissica Washington, DC 20555 Mr. James McFarland (Enclosure)
[f Senior Project Manager Babocok & Wiloor Company f i[g P.O. Box 1260 l
Lynchburg, Virginia 24505 S1070 20 yJ5 3
,.c a.,r,...
..,..e.o
.a e. -
.c.,
c, #
- -. _ _. _ -. _ - -.. _ - _ _ _ _... _ _ -... - _ _., _ - -... - _ - _ _ _ -. _ -.. _ _.. -.... _... _ ~
O ENCLOSURE BELLEFONTE NUCLEAR PLANT UNITS 1 AND 2 STEAM PRESSURE REGULATOR MALFUNCTION BLRD-50-438/81-38, BLRD-50-439/81-41 10 CFR 50.55(e)
' FIRST INTERIM REPORT Description of Deficiency During a May 6, 1981, telecon between TVA and B&W, B&W was not able to specify the minimum departure from nucleate boiling ratio (DNBR) which would result should a steam pressure regulator malfunction occur.
Therefore, TVA is unable to verify the extent of damage which would result from a steam pressure regulator malfunction. This is unacceptable since the chapter 15 FSAR analysis states that the steam pressure regulator malfunction is bounded by the steam line break event. Also, the steam pressura regulator malfunction is a condition II event and, as such, must have a minimum DNBR greater than 1.24, per section 4.2.3 3.5 of the FSAR.
As stated above, B&W is unable to verify this.
This condition may be applicable to other B&W-supplied NSS's; however it affects no other TVA plants since Bellefonte represents TVA's only B&W-supplied NSS.
Interim Progress o.
TVA is wrking with B&W toward a resolution of this problem. TVA sent a copy of the nonconformance report to B&W by formal letter and has requested
'.their response / disposition.
~
F
,h y
g d.
)
e, g e,
g g
h,
'g.
ie 9
_