ML20116H097
| ML20116H097 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/09/1992 |
| From: | Beck G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9211120273 | |
| Download: ML20116H097 (4) | |
Text
L
.3 PHILADELPHIA ELECTRIC COMPANY NUCLEAR GROUP HEADQUARTERS 955-65 CHESTERBROOK BLVD, WAYNE, PA 19087-5691 (215) 640-6000 NUCLEAR SERVICES DEPARTMENT November 9, l'992 i
Docket ~Nos. 50-277 l
50-278 I
l License Nos. DPR-44 DPR-56 U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555
Subject:
Diesel Generator Fuel Oil Consumption Rates-
Reference:
Letter dated 1/31/92 from G.
J.
Beck (PECo) t o. N R O,.
transmitting Technical Specification Change Request 88-08 1
Dear-Sir:
A telephone-conversation between J. W.-Shea, C.
R.- Thomas.-and4 M. T. Widmann (USNRC) and G..J.
Siefert, W. J.-McFarland and::H.-J.e.Ryan-(PEco) ' was - hel d ' on November _4, 1992.
During that discussion-the:-NRC; requested clarification.on the diesel fuel-oil consumption presented in the Reference letter.
TheLspecific requests'ani their_ resolution?are-
'. presented in-Attachment-II to this letter.
Attachment I contains-the oath or af firmation required for supplemental information to a Technical Specification Change Request.
Sincerely.yours,
(
Geo ge J. Beck-Manager-Licensing:
i j 4
Attachments
-cc:
T.
T.' Martin, Administrator,-Region I, USNRC j
J. J. Lyash, USNRC Senior Resident Inspector, PBAPS il 9211120273,921109 07J~
PDR.ADOCKi05000277_
o l
p.
"PDR-
, M p:
.j 1
A oCOMNONWEALTH OF PENNSYLVANIA ss.
COUNTY OF'CHESTER' G.
R.
Rajney, being first duly sworn, deposes and says:
That he is Vice President of Philadelphia Electric Company;-
that he has read the Supplemental Information to Technical Specification Change Request 88-08, and knows the contents thereof; and that tha statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.
l l
[
- 1
~
(L44di
/ Vice President l
l Subscribed and sworn to c4 VA, before me this
/
day
)ftperM 1992.
of u-Q
/
a Nota'ry Public
\\
l-Notavsal E!ta A SWN/ W.
w_#nnTm Chefse -. m m 995 Tmd
ATTACHMENT'II a
Requeet:
1.-
Page 40-af 44.
The-NRC requested that PECo provide the basis behind the statement that 28,000 gallons' represents
...(G minimum of 6.2 days) for operators to monitor actual fuel consumption and transfer fuel between tanks as necessary":
Response
Seven days of operation of all four PBAPS EDGs requirJa a total of 105,000 gallons of fuel; however, this value is not equally distributed between the four EDGs.
The heaviest loaded EDG (E-4) requires 31,366 gallons for 7 days of operation.
4,480.9 gal / day 31,366 qal
=
7 days 6.249 days 28,000 gal
=
4,460.9 gal / day
=>
round to 6.2 days This represents the length of time that all_four EDG's may run post-LOCA before the first operator action is required to transfer fuel between the tanks to keep all EDGs running with good fuel in all four storage tanks.
2.
Request:
Page 41 of 44.
The NRC requested that PECo provide the basis for the statement that "...if one fuel oil storage tank must be isolated, sufficient fuel would be onsite for 5.6 days of operation with 4 EDGs or 6 days of operation with 3 EDGs."
Response
With one tank out of service, the other three tanks will have a minimum of 3 x 28,000 gal = 84,000 gal total available, a.
Four EDGs operating for 7 days requires a total of 105,000 gallons, or 15,000 gal / day 105',000 gal
=
7 days Thus:
5.6 days 84,000 gal
=
15,000 gal / day This represents the minimum length of time that 4 EDGs may run on-the remaining onsite fuel before more fuel is needed, assuming a DBA LOCA with LOOP and one bad fuel oil tank.
ATTACHMENT II-J b.
Three EDGs operating for 7 days requires 97,000 gallons since each EDG is more heavily loaded than the 4 EDG case.
Therefore, 13,857 gal / day 97,000 gal
=
7 days With one tank out of service, the other three tanks will also have a
minimum of 84,000 gallons-available.
Thus:
6.06 days 84,000 gal
=
13,857 gal / day This represents the minimum length of time that any 3 EDGs may run on the remaining onsite fuel before more fuel is needed, assuming a DBA LOCA with LOOP, one bad fuel oil tank, and any 3 EDGs running.
Operator actions to not operate the discretionary loads used in the fuel analyses could further extend these times.
PECo believes that the above analysis in conjunction with the information presented in our January 31, 1992 submittal provides suf ficient justification for our request to extend the time to re-establish 108,000 gallons of fuel onsite from 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> to 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.
.-