ML19273B757

From kanterella
Jump to navigation Jump to search
Forwards Design Description for Review of Fire Protection Safety Evaluation.Proposes Mod to Reduce Probability of Lube Oil Fire in Containment Bldg.Four Oversized Drawings Encl
ML19273B757
Person / Time
Site: Fort Calhoun Omaha Public Power District icon.png
Issue date: 06/06/1979
From: Short T
OMAHA PUBLIC POWER DISTRICT
To: Reid R
Office of Nuclear Reactor Regulation
References
NUDOCS 7906120224
Download: ML19273B757 (13)


Text

___ -_- - --

/ >

8 ,. .

, i g ...... . + ,

j _A g .

.y*.,-

t. ..
+

, .;.,y-g q, g,,

y .

x ;g ,

3 .

.e .g

.. 7 . . m. s; .

+. s, ..c .. :.nnc<a,e aw ..n ,

w

,- /.

Ornaha Public Power D1strlet

. . ... 7 7 4,gggg:ggg f ,,,, ,,,,,, . oo.s.. ~ eon..x. ..io= - reccenoue .....ooo .... coo ,.o;g ni$7)m;;47 ,

.m ' :c w

. r 4.y J ne 6, 1979 , ":p$eM

'.0 s(

N Yf $$

s, 3:, ;p e -ri1 c-$-

  • P
y,,' u, w ' e e
$l ,,-

['}

i' Director of Nuclear Reactor Regulation .j

]1 [f; ATTN: Mr. Robert W. Reid, Chief Operating Reactors Branch No, h U. S. Nuclear Regulatory Commission

Reference:

Docket No. 50-285 Gentlemen:

In accordance with Section 3.2.3 of the Fort Calhoun Station Fire Protection Safety Evaluation Report (SER), issued by the Commission on

", - August 23, 1978, the Omaha Public Power District herewith submits five "9 (5) copies of the attached design description for review. The de:,ign "y

E description proposes a modification to collect and contain reactor coolant pump lubricating oil leaks in order to reduce the probability 3

of a lube til fire in the containment building.

_g

"[ As indicated in the SER, the Commission must review and approva 5; this modification. As such, it is respectfully requested that a timely

, review be performed in order that a final design can be accomplished

" and modifications tan proceed on schedule. The District's staff re-mains available to provide assictance to expedite your review.

_ , Since, rely, u

g/ %, n' n I

) tas Q T.Assistant El ShortGeneral Manager h , s TES/KJM/BJH:jmm l -

Attach. m-cc: LeBoeuf, Lamb, Leiby & MacRae 2350 043m - ,

E 1333 New Hampshire Avenue

~

E Suite 1100 E Washington, D. C. 20036 I ,j N a + e. ~. ,' -

E or.v.gs f.

E $q, I

7906120nM - ffj,f*-la[y s c P.

7, s ene rc

,m- dens %

dd!/ 7' f k h sec ' DMEMM l _

a. axmyy .

( ,, $ $ m$'U E $ $0lIE b

'-s c. _ m RCP Lube Oil Collection c5g.B 2-2 FORM PREPARED BY d, [ #' A' 'nc? Preliminary Design Description -

CHECKED BY,'~

K ,

ss. 1 CONT. ON SH. _ '2 ' '

APPROVED REV.

g DATE Ay 77, OMAHA PUBLIC POWER DISTRICT

~

, GENER ATING STA. ENG.a -

nR No. YC-78-57_

> . (,

~

FORT CALHOUN STATION 1 .

RCP LUBE OIL COLLECTION g

- MR-FC-78-57 PRELIMINARY DESIGN m.

=' DESIGN DESCRIPTION _

i. A. DESIGN BASIS - REQUIREMENTS il3 ' 3. TECHNICAL DESCRIPTION C. ANALYSIS
f. '
< ~

'~

C ,

D. SAFETY EVALUATION

-y

5{

>; ATTACHMENTS

1. ATTACHMENT 1: DRAWING SHOWING THE EXISTING Q CONFIGURATION OF THE RCP MOTORS 3

N 2. ATTACHMENT 2: DRAWINGS SHOWING THE PROPOSED

. LUBE OIL COLLECTION SYSTEM

, ATTACHED TO THE RCP MOTOR

a. NUS Drawing 1928-L-011
b. - NUS Drawing 1928-L-012 4 c. NUS Drawing 1928-L-013 y d. NUS Drawing 1928-L-014 l.g .

A -

f .

2350 044

-g ,

=

=M .

E REV. 1/79

i l[' t ,

RCP Lube Oil Collection GSE-B.2 2 FORM PREPARED BY J/J d . D . - 7 Preliminary Design Description

. . y-

~

CHECKED BY * *"'~' " SK 2 CONT. ON SR '

APPROVED REV. O D AT E  ; ,, 7 9 OMAHA PUBLIC POWER DISTRICT ~

FC-78-57 GENERATING STA. ENGJ >

MR HO. -

g' i

j -

A. DESIGil BASIS

*.s

In accordance with ee Safety Evaluation Report by the Office of fluclear Reactor j' 3 .

g Regulation, U. S. fluclear Regulatory Commission, Docket tio. 50-285, paragraph g.

3.2.3, page 3-1, a modification will be made to the reactor coolant pumo. mnto'rs -',_i' .

to contain a potential lube oil leak and drain the leaked oil to a safe place. ,

5 This will reduce the probabil.ity of a lube oil fire in the Containment Building.

I ' B. TECHt41 CAL DESCRIPTI0il m e s j; '

Eij Omaha Public Power District is performing the design and the fabrication and instal-2.

lation supervision for the oil collection system for the four (4) reactor coolant p' ump motors for Fort Calhoun Station Unit I. The oil collection system is designed E to meet the following criteria: ,

"These systems would collect oil leaks from the lift pump, oil cooler (if

external to reservoir), flanged or gasketed oil connections, oil level I sight glasses, drain and fill connection points and oil reservoirs."

Also.'the system is designed to contain a pressurized oil leak from a crack in ry part of the lubrication oil system external to the pump. The collection system con-g sists of three sealed pans (12-in. deep) connected together with a three piece cover g and completely encloses the pressurized oil containing components. The predominant g material is 16 gauge, Type 304 stainless steel. Each pan has a 2-in. drain to a y collection tank located in the basement. There will be one drain tank for each -

= pair of motors in a RCP/ steam generator cavity. The field installed drain piping 3 ,

will have a flexible coupling to the collection systen to allow for mntor' movement.

l The design philosophy was to design leakproof bottom pans so they would hold the j maximun. amount of oil that could leak out even if the pan drains were plugged.

The tops are designed to contain leaks frcm pressurized line to prevent oil from

.g , being sprayed outside the collection system. The top portion is not leak proof,

'i. but seans are designed so that oil sprayed on them will stay inside the collection 3~ system. The following additional design criteria are applicable:

?

2. 1. The following will be perfonned to assure a satisfactory system:

m Critical dimensions will be, field measured, documented and w . independently verified.

2 Design reviews will be conducted at various stages of the design. .

The original designer will follow the system through installation.

4 ,

Leak checking of the system will be performed. 2350 045 Fabrication and installation will be supervised by the responsible e i,- design engineer. ,

t

REV.1/I9-n .-x@

i

GSE-B-2-2 FORM PREPARED BY ' RCP Lube Oil Collection

' ";W "M..

~

/-

CHECKED BY

Preliminary Design Description-

~

> - ~

SH. 3 CONT. ON SH. 4

. APPROVED oAd

-/u > t REv. g DATE 4 ge,,77 OMAHA PUBLIC POWER DISTRIC-4 HR t10.. GENER ATING STA. ENG.

2.~ The collection system will contain more than 110 gallons of oil in the leakproof pans even if all drains to the basement drain tanks are WD . plugged. One-hundred and ten (110) gallons is the most oil that can 1 x leak into the system for any single failure.

3. Adequate ventilation will be provided for the oil lift pump motor. -
4. The following items will be incorporated for convenience for motor
  • maintenance:

. Quick access ports for oil cooler tube bundle inspection.

_ - Quick access latch for fill, level gage, and drain.

_ c. Top and side can be easily removed for access to pressure switches,'

j, lif t pump, etc.

Seals will be st.mdard, readily available types.

~

7, .

f; The collection system drains can be used for routine draining of'

{ oil for maintenance.

=!

f 5. The collection system will be designed such that a failure of a water pipe to the oil cooler inside the system will not flood inside the motor or cause a structural failure of the system.

6. Large pieces of the system will have lifting lugs for crane attachment.
7. Collection system pieces must be small enough to go into containment through the personnel air lock.

. 8. The following are applicable to the collection system drain tanks: ,

- will be located on the basement floor at Elevation 994'. (The

, oil cooler is at Elevation 1022.5'.)

, - Capacity will be 150 gallons. ,

- Will have a drain and vent with the drain located such that over-

. flow for one pump motor failure is impossible.

- One drain tank for two pump motors or two 150 gallon tanks total

= will be provided.

The predominant material will be 16 gauge, Type 30' stainless steel.

9. .
10. The system can be removed so that the motor can be recoved through an eight (8) foot-diareter opening.

. 11. The largest piece will weigh less than 180 pounds.

2350 046 REV. 1/79 m . _ . . . _ . . . .

/- .

, RCP Lube Oil Collection

~

"' Preliminary Design Description

' . GSE- B-2 2 FORM PREPARED By '~~

SH. 4 CONT. ON SH. 5 CHECKED BY " ~

APPROVED._ & dn X OMAHA PUBLIC POWER DISTRICT HEV. - O.- DATE h y'2$ M GENER ATING STA. ENG.

tiR t10.

C M .

The following oil system failures will be collected:

.12.

oil cooler housing, drains, inlet and outlet lines.

lift pump and its inlet and outlet lines.

- drain, fill and level gauge.

- oil cooler tube an - motor shaft oil dam.

The lower oil reservoir is not being collected since it contains only four (4)

M a gallons, has an internal oil cooler and there are no pressurized 7

$4 glasses, etc.

mitter housing has a pressure rating of 500 psig and it is exposed to only 1

- - .. inches of oil.

The preliminary design for the oil collection system is presented by fiUS Drawing k tiumbers 1928-L-011

-012, -013 and -014 (Attachment 2). There will be some minor 3., variations to this basic design for each of the four motors to accomodate i ferences in the RCP cavities.

_r C. ANALYSIS

[

The following myiews, analyses or calculations will be performed to insure the adequacy of the system:

1. A seismic analysis will be perfonned to assure the system will not fall g '

on a safety-related item during a safe shutdown earthquake.

2. The collection system will be reviewed for each pump motor /RCP cavity .

' for adequate ventilation of the pump motor.

3. A calculation will be performed to show the irpingement of 1000 psig

". oil will not penetrate the collection system.

4. An a lysis will be perf roed to show the collection system does not B cause motor vibrations.
  • E

==

2350 047 .

=

m

?

-1 ,

REV. 1/79 I ._. ..

GSE-B-2-2 FORM '7 '

PREPARED BY. r1 $ar D ign CHECKED GY " '- ~

'-[' cription C4g H. 5 ONT. ON SH.

APPROVED REV. O DATE A up 79 OMAHA PUBLIC POWER DISTRICT MR NO. _FC-78 67 / '

GENERATING STA. ENG. -

D. UNREVIEWED SAFETY QUESTION EVALUATION (10 CFR 50.59)

Procedure / Procedure Change / Modification MR-FC-78-57 a

I. The probability of occurrence or the consequences of an accident or mal-function of equipment important to safety previously evaluated in the safety analysis report may be increased:

I No. The installation of this system reduces the probability of occurrence of a lube oil fire.

~

It does not have an adverse affect on the operation of

- any other safety related components. The system will be seismically y; designed and supported.

i

@ 'II. Possibility for an accident or malfunction of a different type than any y . evaluated previously in the safety analysis report may be created: -

q

! . No. It reduces the probability of fire. The possible effects of its j installation on the performance of other equipment indicates that it will

not create any adverse circumstances which weren't previously evaluated in the safety analysis report.

.I III. The margin of safety as defined in the basis for any technical specifi-cation is reduced.

No. It is a passive system with no moving parts. It has been shown not to interfere with or reduce any safety related equipment's function. It reduces the probability of fire and thus could only contribute to increasing the margin of safety.

2350 048 f -

\

~

REV. I/79<'

______y- , _ . _ _ _ _ _ _ .

/ .

~, .

i

a. ,

.i e,. .

,c ,

- C

- ~

9.c . ,

o 1 s

, ., .' !I .y

.c , ..

h.,,.

'O ATTACHMENT 1 w..

T n EXISTING RCP MOTOR CONFIGURATION i;

r I

I>m>

4 14 i

M 2350 049

_j - .

' t' t

i 1

m,

-g m

o E-E

=

E.

-a w

Mi

= , .

=6 a .

m.

. g'

' t ,V

/

'.. Attachment 0 -

w eg.

o gs m soo t. 'I .

! 8 i

.s!

'l;l..t'n:ii v --

r .: Pl 's d.s 11i--1 -

= - 3- 1 aj ei 2!!esi.p!  !'!*

fI (!i; .se 1;.:.'.ri;i -- - - -

! .5 =>

s:q!31

~ d.

jj

1  :

o

: . r:=: . ! *: :i **3 t:

3,i 1 II sJ 3 m-r :

= 5 :!j,I --err isi15 ga% D.

  • ic::-' :;.i  !:;.- :..:::
s :1!e *:1$CD:

.w . s. }I8 :. .1 h t h l

  • i,lI,III
  • r= ."s ni g * '
  • E

~

t*1: 1i[Mi itis:!@..!..;1.1N..!:!:i.ii..

.2 . - -

j!w ".

..$1

~~

, .53) E.i!.  !.!! -e!.*!

.. l g  :  ! . !# .. . I j r . . [p.!.!..!

c .. .  :: : ,.. . 5. . i . :: . .. .., , .

i:j...

t;. /3.i. b :. .. .s .: c .

1r >

. 1

. f . . < e I*i!!!!!5$!il$ f ;r i!Ii:!!!! hj;jhN '

~

i

~z 4

il, >

ni!!! 11 iiii its !: :i!!ii I!tM".4 a 7

2 4 4 fi s iisi 4i-"

4 44 4-= ::

= bQ 3y .

. .. .. m n b  :- cs ' ff;i

a

=  ;

.s:-

3,.-

3.
.ges:::::-:;;

. .y.  :

i -- .1 e.p...!!

s- 1 p?irt i

}I((.:::::! g E"-

=. 4 ..,...=.:.

.:::: - t. 5 t

s -f..dsi .

... *a .

ag .a - 1

.- e. u. I'

r. I. t!. N.  : IE. gggu. g 4

N II,!.

.!. 5:i. 25 d- E:,5 e

.j{g - I \ I:g,ge221 ' s=

s.y: -

g, 1 T.. .sz-. - a .

. s {t 95 I q

f.f.hlfslil.i..t.-._\-

=....-2:.as}L.h,g c ut %'

g. r Y@UK -

7

h

e. I.n

. Et

j. !$  ::

, 2 - - .f Y*k W)k.[ $ h .!, j.f P - r8 :. , ,* '?" .

E!! i __5 i

  • 2"blM E I -1A 2s \

- __ w:*d j .

3;r

-c,~.

aa l . . -

.3 as P

4 32

- '/ / " -

P=4 G 3 / ' ' ,s.f/

.,-

  • f l. )J%2 l. .'

s

}

L 21 F- i-a.

5

-. . is . ;jg .I 1

T/ j j w

4

- s -p/./\,a 4, \,s.,2,; s; . -

l ... K s*# E2. z

l 5)

73

                                                                                                                                 -4.                                      ;'N s ;

y n i ji'/\. i b

                                                                                                          ..           Sg                                  pt ii        I
                                                                                                                                                                                                 !i                                                                  %p%,=          _l i=
                                                                                                                                                                                                                                                                                            'Y u

t

;;t.r! :  :

L3  : a-

   .k.
I .

1 [I, 'l ..!

                                                                                                                                                                                             !r..!. j 'e.                                                         f*                                                                                                             .

s.g . i : : !s : :.: 3_, - s

- . .t. I : rs  : s. :: .: - ..
                  , _                                                                                                      s.               i                                                                                                                                                          rr                                                                            -

> : 18 r:

; i  :: ; I;i .

3 > .s .1 i:

: a , --

3. i i i

                                                                                                    \                                                :' ' ) \ ( :\ \ .
  • ij
                                                                                                                                                                                                                                                                                                                         . ii.

w 3

. lr ::

as

   =
                      -                               :s 7

6_ ! r e- n. i  : a.

s -

ger

    =                                                 i:
                                                                                                  }                  .p-                                                 4              \. r \ \ \\                                               t           I                                         g T

O m! g. tr -li'."!a_

                                                                                                                                                                                           '*                             \ '              i      S                               .                                       #     M E-                                                                          -
                                                                                                                                                      -gm                 r is.ig                                :\\\        \\. i /                                                                             -+, yT1                              ;

g !j 41._q , m c.: . p (N i . 3 . . ,[ e ~ ~- . s .:.... u- u -!

 ,                                       i ! .i ![:. - 'i 8.sN                                                                                                                                                        i
                                                                                                                                                                                                                           ! g IL.

I ij i {Rj^y *G jei =f - - l !! ! !!Q. 7g;,! aIS,

                                         ! I b5ik""
                                                                                                           -$', Y.:..,
                                                                                                                                                  ~

g hEE 8 'W 'g l' ~ i d - oh

                                                                                                                                     -j.n."ai                        -A                                   .$.9                                                                                                                              4'5  !!!   fi                           '

i  % I=h.

                                             . i                 % %id' w. .:1
                                                                                                                                               ;              W ^ pWW wLl1.2                                                     R               1 in--c(.'Tr? , a t$%n ..                    -
l. 3 f" '
                                                                                 .                       .                                                                                                                                                                           . \,

l .'II~ k 0,_..N3!h . 3( - - a le-T"'-- s k$h. .. -.r -.r.E

                                                                                                                                                               ?

i . g.4 -,./ ug;% a-Y "_""'g, *. ~~*

                                                                                                                                                                                                                                        '".kIA_h i

N1 h#\iiW'

                                                                                                                                                                                                                                                         .-                             . m.. % '*.u." -     _

A i N

                                                                                                                                                                                                                                                                                                                                                  ' ll
                                                                                                                                                                                                                                                                                                                                                   , *.=
f. e. t s2.:

i 53-

                                                                                                              /                                                                                                                                                                     1*g;;l4T}s.

f 3 -i / ./ .\ \ L.,; -{--{ > li n- \/is 8  :

                                                                                                                                                                                                                                                                                                                                       .I . i..:
se I -
                                                                                                                                                    \ , ! !! s Ls ..a,                                                       ,

E B  :  ! J.1 I

                                                                                                                                           '                                                                                 I
d - ..- :t- -

1 es 1

                                                                                                                                                                                                                                                                                                               ;i w :i I :*i!

fi

                                                                                                                                                      \. t! !!: !'

jr I .- ilj aJ 3 $ !: } i: !  :! :! seil t ! I! s !* h._ l. , . 'l 5 s i y /Q::: k'%

                                                                                                     $!i!

I f s; 4 5. Si $ !! I--- O L--

                                                                                                                                                            - : :3                                        .

l-I -a ,

                                                                .'                                   :g j g.                        a., t                                 s.                             :.                        .t              1,                                                             .o C r
                      ,.T
                                                                                                                                                                                                                                   -: :                                                                          JJ O

maq.' I; *

                                                                                                     . i t!

[ .n, x. y

n. .D:
                                                                                                                                                                                                                          .1 3        ty        i                                                                                                                                .

s :p;1 RC - 'I lii .*.j 3 i

IS s j = E 1"
                                             .               .             .                 g                     8i                         .                   ,
                                                                                                                                                                                         .                    :     .                   i          .                ,               . -- Tm T T                                               .~ T
    .                  , ..__. . .                                                                                                                                                                                                                       .. . . . . . . . . . _ . _ _ _ _ _                                                                                         E

ea [ h k [ i. P' V e h a b.

  **ws b
      -l t
   ?

I s 1 g. e}}