ML19329C207

Forwards Final Rept ECCS Emergency Sump & Pump Suction Line Testing. Interim Rept Submitted w/761015 Ltr.Commitments to Perform & Rept Results of Testing Provided in 760507 Ltr

ML19329C207
Person / Time
Site:	Davis Besse
Issue date:	12/15/1976
From:	Roe L TOLEDO EDISON CO.
To:	Stolz J Office of Nuclear Reactor Regulation
Shared Package
ML19329C208	List: ML19329C207 ML19329C214
References
171, NUDOCS 8002120930
Download: ML19329C207 (2)

Text

~

NRCFOp A U.S. NUCLCA84 REGULATORY COMMISS:ON DOCKET F4UMIEr c2 rs' 50-346

'. .. . DISTRIBUTION Fon PART 50 DOCKET M ATEP' AL TO: J.E. STOLZ FRot.1 TOLEDO EDISON,CO. DATE OF DOCUMENT l TOLEDO, OHIO 12-15-76 I L.E. ROE

• DATE RECE>VEO 12-16-76 O cc TTc ., ONOTORIZED PROP 6NPUT FORM NUMBER CF COPIES itECE VED 00niciNAL SUNCLASs:FiED OCOPY 3 OESCRIPTION . ,

ENCLOSU RE LTR. RE. THEIR 10-15-76 LTR. . .TRANS THE FOLLOW-. FINAL REPORT ON'THE ECCS EMEPGENCY SDIP SUCTION ING........ LINE TESTING......

/cj Ad 7d ( 1 SIGNED CY. RECEIVED)

/ ( 22 PAGES)

{ [ .

W, 2G ///74 -

DO NOT REMOVb.

PLANT NAME: DAVIS BESSE0 /.

'gMOWLEDGED i

SAFETY FOR ACTICN!ItJFOR?.1 ATION mrvon * "- W-'O ASSIGNED AD: L A R RT(*WM An-

_3RAliCII_ CHIEF ? RnA'Im mT"?-

f r4 64 L /./ , \ B, . PROJECT MANAGER: I 41R9JE_CT MA acER:

_,__LIC. ASST. : __

LIC. ASST. .

INTERNAL DISTR!9UTION fCRPG FT A l SYSTEMS SAFETY I PLINT SYSTD!S SI T SA"dT*U3

/ NRC PDRf//ch1/b /h d GTA IIEIJ;EMAN TEDESQO EMVIno AM2 3 13 I & EJap4ha /.1 " d' '

SCHROEDER BENAROYA DENTO3.1, O L""

OELD 4 flTMAR GOSSICK & STAFF ENGINEERING IPPOLUO El;Vra_.F;ft.

MIPC MAQARRY KItL'C100D ER!'ST CASE KNIC11T DALLARD llANAUER SIli'4EIL OPERATING REACTORS SPANCLER IIARLESS PA'd.JCKI STELLO SITE TECH.

PROJECT MANAGEMENT REACTOR SAFETY l OPERATING TECH. CAMMILL BOYD ROSS EISENHUT STEPP P. COLLINS NOVAK S11AO HULMAN 110USTON ROSZ_TOCZY BAER PETERSON CllECK Bl[I' leg SITE ANALYSIS HELTZ CRIMES I VOLLgR llELTEMES AT & I .

BUNCH SKOV110LT SALT S.\N J. COLLINS RUTBERC I KRECER

, EXTERN AL DISTIMBUTICN CON FROL NUMBER LPDR :ti/t */ ^1 0. /h.cf M WAT LAB:

. BRQOKl!AVIt{_NAT_ tan. .

TIC: ) REG _V,.IE ULRIKSON (ORNL) I

~

l, NSIC: IA_PDR 12739 4

, _A_SLB :

CONSULTANTS: M.

l ACRS CYS IIOLDINC/ 3Et<T .( ' \

Nic f CflM 105 t2 76) 8 0 0 'a k 2 0 7 2 g

^ ^

- . . kuhicty ,

~

ih ,Cy, A

t" E r .J TULFD0 D b.$U$bC.!

N December 15, 1976 / [' g LowELL E. POE

// v.ce Presi:re-t r .a so. .. c .w=,.i Docket No. 50-346 I h * " * * * *

~~

6.BZP Serial No. 171 ww s%d$ ,/s s ew t 6 'e ' '%

s AECd(EO o.

m C ., e 0 207 p0 li.

Director of Nuclear Regulation }---

Atta: Mr. John F. Stolz, Chief yq-*4 rem,,dQ"% C' Light Water Reactors Branch No. 1 9A h*-' '

Division af Project Management  %

United States Nuclear Regulatory Commission "9 g q, f g,,

Washington, D.C. 20535

Dear Mr. Stola:

In reference to the applicant's letter of October 15, 1976 (Roe to Stolz), we are enclosing three (3) copies of the Final Report dated December 15, 1976 entitled "ECCS Emergency Sump and Pump Suetion Line Testing".

This report presents the final results of the model test conducted to demonstrate that the Davis-Besse Unit 1 ECCS emergency sump is not subject to air-entraining vortices after a LOCA and used to evaluate entrcnce losses for the sump. An Interim Report had been transmitted with the above referenced 10/15/76 letter regarding this testing.

The enclosed report also includes a sum ary of the testing performed to verify that the predicted values for piping head losses from the ECCS emergency sump to the decay heat and containment spray pumps were conserva-tive with respect to the actual losses experienced in operation. Commit-ments to perform and report the results of the above testing are found in the applicant's 5/7/76 letter (Roe to Butler).

Yours very truly,

(

db b/6 L2730 THE TCl.CCO EDISON COMPANY C0'SCN PLAZA 3C0 MACISCN AVENUE TOLEDO. CHIO 43652