ML19317D219
| ML19317D219 | |
| Person / Time | |
|---|---|
| Site: | Oconee  |
| Issue date: | 02/16/1978 |
| From: | Parker W DUKE POWER CO. |
| To: | Case E Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19317D220 | List: |
| References | |
| NUDOCS 7911190608 | |
| Download: ML19317D219 (4) | |
Text
-
REGbLATORY It iRMATION DISTRIGUTION SYST.)(RIDS) 3ISTRIBUTION FOR INLOMING MATERIAL
- 2270/287 REC:. CASE E G ORG: PARKER W O DOCDATE: 02/16/78 NRC DUKE PWR DATE RCVD: 02/21/78 DOCTVPE: LETTER NOTARIZED: YES COPIES RECEIVED
SUBJECT:
LTR 3 ENCL 40 LICENSE NOS. DPR-39, 47 Sc 55 APPL FOR AMEND: TECH SPECS PROPOSED CHANGE CONCERNING PROPOSAL THAT THE LOSS OF ONE PUMP TRIP SETPOINT BE DELETED FROM THE SUBJECT FACILITY TECH SFECS.
NOTORIZED 02/16/78.
PLANT NAME: OCONEE - UNIT 1 REVIEWER INITIAL:
XRL OCONEE - UNIT 2 DISTRIBUTER INITIAL:
OCONEE - UNIT 3 w*ooo*****+*****
DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ******************
NOTES:
1.
M.
CUNNINGHAM - ALL AMENDMENTS TO FSAR AND CHANGES TO TECH SPECS GENERAL DISTRIBUTION FOR AFTER ISSUANCE OF OPERATING LICENSE.
(DZSTRIBUTION CODE AOO1)
FOR ACTION:
BR CHIEF
- W *W/7 ENCL INTERNAL:
- RE
- W/C NRC'PDR**W/ ENCL
.Ic FE'f*t#fENCL OELD*^LTR ONLY HANAUER**W/ ENCL CHECK **W/ ENCL EISENHUT**W/ ENCL SHAO**W/ ENCL BAER**W/ ENCL BUTLER **W/ ENCL GRIMES **W/ ENCL J COLLINS **W/ ENCL J.
MCGOUGH**W/ ENCL EXTERNAL:
LPDR'S WALHALLA, SC**W/ ENCL TIC **W/ ENCL NSIC**W/ ENCL ACRS CAT B**W/16 ENCL iUISTRIEUTION:
LTR 40 ENCL 39 CONTROL NER:
780520205
' SIZE: 2P+1P+7P
+++o+*****++++++44***+++++*****++++
THE END 444****+++*44*+***********++++****
5.I90
314.Lw n.
211 W&iNI CL{
DUKE POWER COMPANY Powra Et:ttonxo 422 SocTa Cncacu Sraz.7T. CaAnt.orTz. N. C. as242 m w w a =aa ca. s a.
February 16, 1978 oc: a.cs oc.
c.c. m c u n 7:4
$
- caw PeCOwC* C4 3 ? 3-40 $ 3
(
'/N
,/,,
- Mr. Edson G. Case, Acting Director Ei l
Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission
* 4 c..]
Washington, D. C.
20535 4s.
RE:
Oconee Nuclear Station Docket Nos. 50-269, -270, -287
Dear Mr. Case:
By letter of September 14, 1977, we requested a change in the econee Nuclear Station Technical Specifications, requiring the pump monitor trip function to be set to initiate reactor trips upon loss of one pump in addition to the normal trip upcn the loss of two pumps.
This change was proposed in order to include in the Oconee 1 flux-flow trip setpoint a suitable DN3R margin based on the NRC Rod Bow-DNBR Penalty model.
This Technical Specifications change was approved by the NRC in conjunction with the approval of the Oconeo 1 Cycle 4 Technical Specifications, and the modified pump monitor trip setpoint has been implemented for all three Oconee units.
The pump monitor trip on loss of one pump results in, however, a reacter trip upon loss of power to the pump monitor of any one of the pumps.
Therefore, in order to avoid unnecessary reactor trips, it is desirable to delete the loss of one pump trip setpoint if other DNER margin credits are available.
In the case of Oconee 2 and Oconee 3, the necessary ONBR margins, based on the NRC interim Rod Bcw-DN3R Penalty model, are availa-ble in terms of excess Reactor Coolant (RC) flow, as demonstrated in the Oconee 3 Cycle 3 Reload Report (Bra'-1453).
The requirsd excess RC flew credit is 3% for Oconee 2 and 2% for Oconee 3.
The RC flow verifications performed in the current fuel cveles have confirmed that the required flow of 106.5% + 3% and 106.5*. - 2% for oconee 2 and Oconee 3, respectively, have adequate margins to the available flows.
Therefore, it is proposed that the less of one pump t -ip setpoint be deleted for Oconee 2 and Oconee 3, and pursuant to 10CFR50.90, the attached proposed chcnges to the Oconee Nuclear Station Technical Specifications are requested.
The proposed changes also include corrections to Technical Specifications pages 2.3-1, 2.3-4, 2.3-11 and 2.3-12, which contained infor=ation pertinent to Ocenee 1 Cycle 2 (this information is no longer applicable) and deleted the set-points associated with single loop operation (pages 2.3-2, 2.3-3, 2.3-4, 2.3-11 and 2.3-12).
hD i
750520205 Bs[
0 9
1 p
e
.6 I
?
l*
Mr. Edcon G. Cass, neting Director Pags Two February 16, 1978 4
1 We request that approval of the proposed changes be granted as soon as possible.
Ver 'truly yours,
/
'~n a. n u.
William O. Parker, Jr.
l PMA:ge r
Attachment f
4 k
?
f 4
i i
I l
i l
1 I
I l
,-,,_-,,n-,._,-,,,-.-,.--,,,,..,,,,,-.,.,n,
,n.,.,.----,..
D J
Mr. Edson G. Case Page 3 February 16, 1978
'4ILLIAM 0. PARIGR, JR., being duly sworn, states that he is Vice President of Duke Power Company; that he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission this request for amendment of the Oconee Nuclear Station Technical Specifications, Appendix A to Facility Operating Licenses DPR-38, DPR-47 and DPR-53; and that all statements and matters set forth therein are true and correct to the best of s knowledge.
A
~
d:a
/ w
'41111am O. Parker, Jr., 'Qc)t President Subscribed and sworn to before me this 16th day of February,1978.
hu b uc Notary Pub'lic My Commission Expires:
Februarv 13, 1982
. _ -_.