ML18139A455
| ML18139A455 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 07/11/1980 |
| From: | Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 611, IEB-79-14, NUDOCS 8007180371 | |
| Download: ML18139A455 (2) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 July 11. 1980 Mr. James P. O'Reilly, Di.rector Office of Inspection & Enforcement
- u. S. Nuclear Regulatory Corrmission Region II 101 Marietta Street, Suite _3100 Atlanta, Georgia 30303 Dear Mr.* 0 1 Reilly.:
I.E. BULLETIN 79-14.
SYSTEMS OUTSIDE CONTAINMENT AMPLIFICAI ION OF JULY 8, 1980 LETTER SURRY POWER STATION UNIT 2 Serial No. 611 PSE&CS/CMRjr:jpj :mag Docket No. 50-281 License No. DPR-37 The purpose of this letter is to provide amplification and clar1ficat1on of our letter of July 8, 1980 {Vepco Serial No.* 591)..Discussions were held.
- with Messrs *. D. G. Eisenhut, Wi 11 iam Russell, Donald Neighbors and R. M. Compton in Bethesda on July 8th.
'As a result of those discussions 1t was *felt that some additional infonnation was needed t;o clarify. and anipli.fy our positions contained in the July 8th letter. The following items should be-considered 1n conjunction with that letter;
- 1.
- As you are aware, detailed analyses have not been completed for all supports on LE.Bulletin 79-14 systems outside the con-*
tairiment fm* Surry Power Stat1on.*unit 2.
- However, we have identified approximately 294 supports which we believe
. 2.
must be installed as part of the I.E. Bulletin. 79-14 effort.
. Of these. *only 154 "are on Techn1ca_l Specification systems *
.
- We. have 1dent1f1ed 76 of** th~.154 ~as being related to stress analysis of piping systems and as stated in our letter of J~ly 8, 1980, these will be installed prior to start-up. A total of 136 of 294 modification packages have been. received by.Vepco*as of July 9; 1980.. Thes~ f!Umbers* st1ould be con-sidered as being approximate o"nly **.. '
Item 1 of our July 8th letter mentioned.a 30 day screening.
process for determination' of significantly overstressed supports..
It is our intent to construct modifications during the 30_day screening process concurrent with the determination of whether.
or not the support is significantly overstressed as delineated 1n Item 2 of*our letter. We may forego the.screening process if we believe the modifications can be-installed *during the 30 day period.
We believe this will upgrade the systems in an expeditious manner.
- 3.
We co111T1it to placing the highest pr1or1ty on supports associated with Technical Specification systems.
We will instruct our Archi-tect-Engineers that these modification packages are to be turned over to Vepco no later than 60 days from the date of start-up.
8007180 37/
s
,lo
. e*
Mr. James P. O'Reilly~ Director As a point <>f additional clarification we wish to emphasize ~ matter that.
appears to be overlooked when cons1der1ng Vepco's approach to. resolving I.E.
Due to a lack of original documentation Vepco has been unable to perform a comparison of as-built drawings with originally-designed drawings as stipulated _in the Bulletin.
Vepco I s approach has been to. dynamically analyze I.E. Bul 1 eti n. 79-14 sys-tems, even though these systems were originally analyzed using simplified methods.
Implicit 1n the present approach is a general upgrading of systems to criteria not in existence at the time of the*original design. The _present approach is clearly beyond that required according to the licensing documents pertaining to Surry.
W~ have chosen this approach -because original docum~ntation.is not available.
- Us_e of this approach also allows early developm*ent of a modification package,.. if requried*, based on*preliminary*calculationsiwhile*deta.11ed evaluation progresses *. *rhe modification packages are installed -in an' ~xpeditious manner-and are* veriffed by final calculations to assure that all.possible parameters.
a re. rea 1 i st i c.
We intend to continue our approach. as we bel_ieve that r~p_id upgra~ihg of systems represents a thoroughly conservative and viable m~thod for*meeting the intent of I.L Bul let1n *79~ 14., We plan_ to have the requirements of l. E.Bulletin 79-14 cornplete.ly satisfied no later, than December 31, *1980..
"If you.have any questions plea~e contact,is. :-. _
\\.
la:iic#J({a,,A~/
- a. (/j;o~n. Jr.
- ** Senior Vi e President -.Power Station Engi e,ri_ng. an.d Co_r,st~uctio.
- cc: J4r. Victor Stello~ Director.
..:./
.... ~.
Office of Inspection.and Enforcement Mr. Harold R. Denton,- Director.
-._Office.of_-Nuclear Reactor Regulation
..' :.: