ML19306G340

Comments on Documents Authorizing Increase of Plant Operating Power to 82%.Editorial Changes Recommended to SERs Re SSE & Tornadoes,Reheater & Metallurgical Facts & Firewater in EES

ML19306G340
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/28/1987
From:	Scinto J NRC
To:	Heitner K NRC
References
TAC-63576, NUDOCS 8711120109
Download: ML19306G340 (1)

Text

_

Note ' t o Ken -Heitner 6/28/87

@g(ckground m

i

'b-From Joe Scinto

(.

.1 Re: FtSt Vrain 82% Package I have a couple of comments on this.

I

1) How was 'the limitation on operation above 35% imposed?

By.

Order? by. Confirmatory Action Letter?

l I can't tell whether this letter is the right way to authorize the increase to 82% and to impose 82%'as a-new limit.

This needs

-l

' to be r eviewed by Mr. Schinki's division.-

]

2) The first SER - on SSE an'd Tornados - appears to be based priniarily on the Oak Ridge TER.

Somewhere the-STAFF needs to 1

adopt the Oak Ridge work.

(something like "the NRC staff has reviewed the Oak Ridge TER and agrees with. 0ak Ridge's evaluations and conclusions, except as discussed ~below..")-

0 At the bottom of p.2 and top of p.3 there is a discussion of certain (unclear) contingencies (7) in the Oak: Ridge TER.

It's hard to tell what they are, what they relate to,whether we are agreeing with them or disagreeing with them and why?

What does the last sentence of the para at the top of p.2'say?

It's some sort of paraphrase of App.

R.

Is there any conclusion-associated with this statement?

P.3 You need to do more to explain how you draw an probability conclusion about water hammer etc. "from these oualitative statements".

1

2) The SER on the reheater contains.a bunch of metallurgical facts

-- but there is almost no connection between all this info and a conclusion that the plant can operate saf ely.

3) The SER on firewater in the EES says the objective of the applicants analysis was to show that the primary pressure boundary will remain intact; but all this SER deals with is creep collapse without explanation of why it'is so limited.

j cc:SSohinki EChan

.I L_

l l

)

Tht 3 t co -< Ar

~ v c_

cc-su t v e d h,

6/19i 0 s,s s,,, r, ad E, r?.cl r F o&c o

on l

'l 8711120109 870628 CF ADOCK 05000267

• samCf y

.,:s. v v ~. L a.i,. c,r Vu

• hs % LA - n } &{ hh3 :

c k

k f'

UZITED $TATES.

f NUCl. EAR RECULATORY COMMIS$10N

}' $

.f

~

RWoN lV k*o 4

$11 6'

. PL ATA DRIVE. SulTE 1000 8

p AHLINGToN, TEXAS 79011 L~

-APR 37 iggy In Reply Refer To:

Docket: 50-267 Public Service Company of Coicrado ATTN: Robert O. Williams, Jr.

t Vice President, Nuclear Operctions

]

P. O. Box 840 Denver, Colorado 80201-0840

Dear Mr. Williams:

-y i

In accordance with the provision of Section IV of the Confirmatory Order Modifying License issued for the Fcrt St. Vrain Nuclear Generating Station on-April 6,1987, I am herewith ~providing written authorization for the Fort St. Vrain reactor to operate in excess of 10 percent of full power.

Nothing in this release shall be construed to modify or' change tim aforement'.oned order, as this is the release specified in that order.

In effect you are now released to aperate up to 35 percent of full power,.

Since y,

^ :

^

Robert D. Martin w

Regional Administrator cc:

Manager, Nuclear Productio.1

- N Fort St. Vrain Nuclear Stat 16805 WCR 191 Platteville, Colorado 80651 e

P. Tomlinson, Manager. Quality Assurance Division (same' address)

T. Murley, Director Nuclear Reactor Regulation Colorado Radiation Control Drogram DfNector 9 E

Colorado Public Utilities L iojon r.

l(

.i

.r r

M

' M ' '( 2 P G A f M'7, F

y T,

9 g-

~

Table 4.2-7 PERFORMANCE RANGE OF VARIABLE FOR EACH STEAM GENERATOR MODULE Full Load (100%)

One Quarter Load (25%)

O erating Condition P rformance Range Dimensions Minimum Nominal Maximum Minimum Nominal Maximum Helium Flow Ib/hr 278,490 284,170-289,850 81,800-83,500 85,200-0utlet Pressure gsia 686 686 686 589 589 589 Inlet Temperature F

1,357-1,427

.1,467 1,121 1,231 1,341 Outlet Temperature F

736 742 747 612 577 561

' 0.36

=0.36

=0.36 Pressure Drop psi

=3.47

=3.47

=3.47

=

Feedwater/ Main Steam Flow.

Ib/hr 170,000

.192,110 206,500 36,600 48,030 59,600 Outlet Pressure gsia 2,51 2 2,512 2 512_.

2,419 2,419 2,419.

Inlet Temperature F

403' 403~

",403-301 301

~301 Outlet Temperature F

1,005 1,005 1,005 1,000 1,000 1,000 Pressure Drop psi

=520

=590

=29

=45

=65 Reheat Steam F1ow _

lb/hr 187,150 187.150 187,150 45,400 45,400 45,400 Outlet Pressure-gsta 600 600 600 151 151 151 Inlet Temperature F

_ 673 673 673 567 567 -

567 Outlet Temperature F

967 1,002.

.1,022 926

'1,001 1,075 Pressure Drop' psi

=42

=42

=42

=11

=11

=11

= 1 1iE a so t a%

_92_R.

85 3g

)> Tth

.,-.M 6

i er-s.

...re-n-,-.

w

--,em---

,w-,

e

+.-,..,-.-m i - r-w w= = = =

w--wa r.

-,e

m

~~

' ^ bA l D R

u Revision 4.

s, 9.22-5

~

i panelC, co;bol room control panel an;i cont automatic initiation of associated fire sunpression syst rol devices required for i

ems.

Two msoning types of detectors and thermal detectors. detectors are utilized:

l rise, continuous st. rip, or ' heat actuated device 1

bh rate of s.

1 In 'ths' eveH.

fire watches are ds aM ;shed u tet the detectors catoa l ' service, in accordance with Ted.htcal Spedificati i

n be returned to ons.

9.12.3.3.

Fire Suppression Soms Fire Water Systems. The provTdes a reliable water. $9W1y for suppressing fires fire protection water supply system reactor and turb'ne buiidings by supplying fire water t in' both the sprinkler systems, deluge system, fixed water spray o the wet pipe hose reels and yard systems, manual redundant 100% capacity fire water pumps are provide 1500 gpm at 125 pijg TDF Two and the standby _pumVdfe,!.

, each rated for sel engine drive.The main pump is electric m driver with irde Each pump has its own a separate"roca,per.deni power supplies and controls and is loca wall.

divided by a minimum 3-hour fire rated concrete The firs s ter pumpt-communicate directly with the main cr311ng tower basint.a

(

is supplied to the main cooling t Fire water via a circulating water makeup pump.ower basin from two storage pcads nake up rate exceeds the The normal cooling tower water systems.

The water inventory in eachrate at which water is used by t water approximately 13 pond is maintained at million gallons by watsr sources.

pur. ped from two river feet above grade level maintains a constadt h pproximately 132 storage as a. source of water making frequent starting of a

n the system.

The re 4ter pumps unnccessary for minor demand on the systca i

fire water pump Water for fire suppression is provided from the ffre to the station by means of a 10 sur rounding the station.

inch ' underground water pumos The fire water is then distributed to t main loop wet pipe sprinkler

systems, systems, deluge ' systems, fixed the underground loop. manual hose stations and fire hydrants v wa ter - ~ spray Alarm monitored cMk ' valve's" are enh of the nine r es from control room personnel to the demand forfire water supply r ser provided in suppression systems are shown in Figure 9.12-2 fire water.

These water r

The wet pipe sprinkler systems utilize thermally a futibie: link spray nozzles ano are connected with fi i firi _. Wa t r supply system. such that water will be discha rge xed' piping to the ime.cSately from the nozzles opened by fire systen protects-the followiy.treas:

The wet pipe sprinkler the steam driven boiler feed I

a w'.

'J-.

d '. - -

..