ML19210B148

From kanterella
Revision as of 13:04, 19 October 2019 by StriderTol (talk | contribs) (Created page by program invented by StriderTol)
Jump to navigation Jump to search
Submits Schedule for Equipment Mods to Provide Alternate Flow Path to Prevent Boron Precipation from Compromise of long-term Core Cooling Following Loca.Also Forwards Abstracts of Associated Procedures or Procedure Revisions
ML19210B148
Person / Time
Site: Three Mile Island Constellation icon.png
Issue date: 05/27/1975
From: Arnold R
METROPOLITAN EDISON CO.
To: Lear G
Office of Nuclear Reactor Regulation
References
GQL-1094, NUDOCS 7911040079
Download: ML19210B148 (4)


Text

r .-' / I

~~ l

,

  • *

-

  • NRL- 'STRIGUTION FOR PART 50 000 .T MATERI AL

.

(TEMPORARY FORM)

.# *

'D D ,

CONTROL NO: 6993

, , ,

Jw3 *

,

' ~ #

_

FILE:

FROM: Metropolitan Edison co DATE OF COC DATE REC'D LTR TWX RPT OTHER Reading, Pa .

. R C Arnold 5-27-75 6-2-75 XXX

-

TO: - l ORIG CC OTHER _ SENT AEC POR YY Mr Lear y one signed XX

,

SENT t.OCAL PDR CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:

  • XXXXXX .

1 50-289 DESCRIPTION: ENCLOSURES: ~ '

Ltr re their 4-19-75 ler.... furnish'ng, i

  • *

.

-

info with regard to the scheduled sub- '

" -

- -

. ,

mission of material conc.erning alternate flow path so as to assure that boron -

pQNOT REMOVE

- -

~

precipitation would not compromise IDCA -

@M

..... ....

.ACyJ0WL ,

~

PLANT NAME: Three Mile Island #1 FOR ACT!ON/INFORMATION 6-4-75 ehf

  • BUTLER (L) SCHWENCER (L) ZlEMANN (L) REG AN (E) .

W/ Copics W/ Copies W/ Copies W/ Copics CLARK (L) STOLZ (L) DICKER (E) LEAR (L) '

W/ Copies W/ Copies W/ Copies W/ Cooies P A i; R I ) VASSAi i n ti ) n yg uTo m egy spr.73 W/ Copies ,

W/ Copics W/ Copies W/ Copies KNIEL (L) PURPLE (L) YOUNGBLOOD (E) LICZ::SI!:0 PROJECT MANAGER W/ Copics W/, Copies W/ Copies W/ Copics INTERNAL DISTRICUTION

" c 3 TECH R EVIE'.'! DENTON LIC ASST. A/T IN D .

7pNRC PDR SCHROEDER GRIMES R. DIGGS (L) B R AITi.i AN j 0GC. ROOM P 50EA MACCARY GAMMILL H. GE ARIN (L) SALTZMAN

,,40SSICK/ST AF F KNIGHT KASTNER E. GOULEOURNE (L) MELTZ j CASE ' DAWLICK!

-

BALLARD P. KREUTZER (E)

,,,GI A M B USSO SHAO SPANG LER J. LEE (L) PLANS _

BOYD /STELLO M. MAIG RET (L) MCDONALD MOORE (L) HOUSTON ENVIRO S. REED (E) CHAPMAN DEYOUNG.(L) NOVAK('J) MULLER M. SERVICE (L) DUBE (Ltr)

SKOVHOLT (L) ,,J10SS DICKER S. SHEPPARD (L) E. COUPF GOLLER (L) (Lir) , IPPOLITO KNIGilTON M. SLATER (E) PETERSON P. CO L LINS YOUNGBLOOD H. SMITH (L) HARTFIELD (2) f TEDESCO DENISE J. COLL 1::s REGAN S. TEETS (L) KLECKER -

, R_E_G_OPR f LAIN AS PROJECT LDR ,G. Wil Li AMS (E) EISENHUT .

/ FILE & REGION (2) BENAROYA Sman_

j_HA R LE SS V. WILSON (L) .WlGGIN TO N ,

MPIC VOLLMER R. INGRAM (L)

STEELE

,',

.@3 ,

,

'

EXTERNAL DISTRIBUTION Ul M f

1 - LOCAL PDR Ho-ts bur ,b

'

<1 - TIC (ABERN ATHY) (1) )(10) - NATION AL LASS 1 - PD R-SAN /LA/NY el - NSIC (SUCH AN AN) 1 - W. PENNI:'GTON, Rm E 201 GT 1 - BROOKH AVEN AT Ln3 1 - ASLB 1 - CONSULTANTS 1 - G. ULRIKSON. 0 ':L

. . . .1 - Newton Anderson .

NEWM ARK /B LUM E/AG B ASI AN 1 - AGME D (RUTH GL Z'.. A...

lY- ACRS ':C L ;.~.;ENT Rm B-127 GT

' .To L. A . 7 .it 3 1- J. o. RuNKLES. Rm E.20 -

'79110 400 77

.

" 1586 344

-

. s

. .

.

/

hMA7 L=C -, --

s METROPOLITAN EDISON COMPANY

. - - - - - - . . - _ . . - . . - - - - . - - _ . - - - . . - . - - - . . . .

POST CFFICE BOX 542 READING, PENNSYLVANI A 19603 TELEPHONE 215 - 929-3601 REGg ,,,O D v -

May 27, 1975

/ ,,ef hv GQL 109h p .-

1. %

sL . o.- .' *...

.

1

'-

i% Y NOCK i l'e: IKt: ..

> -

-

Mr. George Lear, Chief Operating Reactors Branch 3 ETPizE C0g 'd it

.JUN2 1975

n. ,, ;.n m j-ds!

Division of Reactor Licensing -

Rc.: ' . )-

U. S. Nuclear Regulatory Cor: mission Washington, D. C. 20555 g[ Q he'N/

j'

Dear Mr. Lear:

Three Mile Island Nuclear Station Unit I (TMI-1)

Docket No. 50-289 Operating License No. DPR-50 In our letter (GQL 0954) of April 19, 1975, we stated that we would submit (1) A schedule for the completion of equipment modifications necessary to provide an/ alternate flow path so as to assure that boron pre-cipitation would not compromise long-tern core cooling capability following a loss-of-coolant accident (IDCA), and (2) Appropriate abstracts of associated procedures or procedure re-visions.

~

With regard to Item Number (1), the schedule given belov vill be instit g N upon receipt of NRC approval, g

%En$  ?.

Time Action 6

393 21975P p ,

  • Approval of proposed actions -

u.5. %L,se, 7 N M

q.

2 months Final detailed equipment design and associated procedur' **'5""**

<q review and modification

'g,/i m g \M,o' 1 month Final design review by Corporate Technical Support Staff and Station Operating Staff 9-12 months Equipment procurement 1-2 months Equipment installation. As installation of some equipment could be outage-dependent, this action vill depend heavily on early re-ceipt of required materials so that preliminary work may be accom-plished during scheduled outages.

1506 345 Ec33

,

. .

-

Mr. G. Lear 2 NRC

  • Date contingent upon NRC review / approval of our proposed actions as out-lined in our letter of April 19, 1975 With regard to Item Nu=ber (2), the TMI-1 operating and emergency procedures were reviewed and changes are being made to Operating Procedure 110h h - Decay Heat Removal System, and Emergency Procedure 1202 Loss of Reactor / Reactor Coolant Pressure. An abstract of these procedure revisions is given as Attach-

=ent 1. The procedure revisions have been approved by the TMI-1 Plant Operations Review Committee and have been signed by the Station Superintendent. A copy of the revisions is available at the TMI-1 site.

We trust that we have adequately addressed any of the concerns that you may have had regarding the subject areas; however, should there be any additional questions or concerns , please contact me.

Sincerely,

/2? L R. C. old Vice President RCA:RSB:eg File T.T.h.1.1/20.1.1 i 536 346

.

O

, . .

  • *
  • ATTACHMENT I Metropolitan Edison Company Three Mile Island Nuclear Station Unit I (TMI-1)

R. C. Arnold to G. Lear May 27, 1975 ABSTRACT OF REVISION TO OPERATING PROCEDURE 110h h A new section- h.3.5, Long-Term Core Circulation Modes to Prevent Boron Concentration Effects -has been added. The procedure describes the necessary actions to implement each of the following modes of circula-tion.

Mode 1 -

Forced Circulation Using Decay Heat Drop Line Mode 2 - Gravity Draining Reactor Coolant Hot Leg to the Reactor Building Sump Via the Decay Heat Drop Line Mode 3 - Hot Leg Injection Using Pressurizer Auxiliary Spray Line (Not yet available, pending system design change)

Mode 4 - Reverse Flow Through the Decay Heat Drop Line into "B" Reactor Coolant Loop Hot Leg ABSTRACT OF REVISION TO EMERGENCY PROCEDURE 1202-6 A new requirement has been added requiring that a long-term cooling cir-culation mode be established per OP 110h-h.

T;qI-E ua b[i7

-