ML17037B536

Letter Regarding a Report Entitled Plant Unique Analysis Report for Torus Support System and Attached Piping for Nine Mile Point Nuclear Power Station

ML17037B536
Person / Time
Site:	Nine Mile Point
Issue date:	09/02/1976
From:	Schneider R Niagara Mohawk Power Corp
To:	Lear G Office of Nuclear Reactor Regulation
References
TR-2271(a)
Download: ML17037B536 (8)

Text

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PLANT MME:Q(gg ENCLOSURE FURN REPLACEMENT PAGES 17 AND 71 FOR THE FLANT UNIQUE ANALYSIS REPORT FOR TORUS SUPPORT SYSTEM AND ATTACHED PIPING FOR NINE MILE, POINT DATED 7-30<<76.................

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NIAGARA MOHAWK POWER CORPORATION NIAGARA~

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Oz Director of Nuclear Reactor Regulation Attn:

Mr. George Lear, Chief Operating Reactors Branch g3 U. S. Nuclear Regulatory Commission Washington, D. C.

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Re:

Nine Mile Point Unit l Docket No. 50-220 DPR-63

Dear Mr. Lear:

Our letter of July 30, l976 transmitted a report en-titled "Plant Unique Analysis Report'or Torus Support System and Attached Piping for Nine Mile Point Nuclear Power Station."

Attached are replacements f'r pages l7 and 7l which supply corrected or missing information.

These changes are denoted by vertical margi nal 'markings.

Very truly yours, NI'AGARA MOHAWK POWER CORPORATION R. R.

SCHNEIDER Vice President - Electric Production

/sz Attachment

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Technical Report TR-2271(a }

0 1 "r>"IH <DYNE MATERlALSRESEARCH TABLE 2.0 PIPING SYSTEt1S.

'Ss tern Containment Spray Pump Suction Core Spray Pump Suction Torus Spray Header Containment Spray Test Vacuum Breakers Core Spray Testline uantit Diameter

~ln.'

12

'12 30 Thickness

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.375

.375

. 237

.125

. 500

.125 Suppression Vessel Air Vent and Fill 1

Conden'sate Makeup 1

[ Suppression Vessel ii2 Vent and Fill 1

20 8

20

.375

.125

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'.chnical Report

'.<-2271 (a)

-7.1-TABLE 11 VITAL PIPING SYSTEMS r<-TEL YNE MATER(ALSRESEARCH STRESS VALUE (ksi)

PIPING SYSTEM EVAI UATED CALCULATED ALLOWED CONTAIHMEHT SPRAY. PUMP SUCTION 21.4 45.0 CORE SPRAY PUMP SUCTION 11.2 45.0 TORUS SPRAY HEADER SUPPLY 8.0 45.0 VACUUM BREAKER LINES 6.0 45,0 TABLE 12 NON-VITAL PIPING SYSTEMS PIPING SYSTEM EVALUATED STRESS VALUES (ksi)

CALCULATED ALLOWED CORE SPRAY TESTLIHE 3.8 75.0 CONDENSATE MAKEUP 28.1 75.0 COHTAIHMENT SPRAY TEST

~ Suppression Vessel Air Vent and Fill 43.6 15.7 75.0 75.0

. Suppre'ssion Vessel N2 Vent and Fill 68.2 75.0

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