ML20245D878: Difference between revisions

From kanterella
Jump to navigation Jump to search
(StriderTol Bot insert)
 
(StriderTol Bot change)
 
(One intermediate revision by the same user not shown)
Line 2: Line 2:
| number = ML20245D878
| number = ML20245D878
| issue date = 08/08/1988
| issue date = 08/08/1988
| title = Responds to 880628 Ltr Re Licensee Appeal of NRC Position on Plant ATWS Rod Injection/Recirculation Pump Trip Sys Instrument Diversity Requirement.Atws Rod Injection Design Not in Compliance W/Atws Rule
| title = Responds to Re Licensee Appeal of NRC Position on Plant ATWS Rod Injection/Recirculation Pump Trip Sys Instrument Diversity Requirement.Atws Rod Injection Design Not in Compliance W/Atws Rule
| author name = Murley T
| author name = Murley T
| author affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
| author affiliation = NRC OFFICE OF NUCLEAR REACTOR REGULATION (NRR)
Line 11: Line 11:
| contact person =  
| contact person =  
| document report number = NUDOCS 8905010209
| document report number = NUDOCS 8905010209
| title reference date = 06-28-1988
| package number = ML20245D855
| package number = ML20245D855
| document type = CORRESPONDENCE-LETTERS, NRC TO UTILITY, OUTGOING CORRESPONDENCE
| document type = CORRESPONDENCE-LETTERS, NRC TO UTILITY, OUTGOING CORRESPONDENCE
Line 29: Line 30:


SU8 JECT:                                                                                              l DIVERSITY REQUIREMENT OF ATWS RULE (10 CFR 50.62)
SU8 JECT:                                                                                              l DIVERSITY REQUIREMENT OF ATWS RULE (10 CFR 50.62)
The purpose of. this letter is to respond to your letter dated June 28, 1988 relating to the Carolina Power & Light Company's appeal of the staff position -
The purpose of. this letter is to respond to your {{letter dated|date=June 28, 1988|text=letter dated June 28, 1988}} relating to the Carolina Power & Light Company's appeal of the staff position -
on Brunswick ARI/RPT system instrument diversity requirement. Paragaph 3 of                              l the ATWS rule requires each' boiling water reactor to have an ARI system that is diverse (from the reactor trip system) from sensor output to the final actuation device. The staff concludes that the Brunswick ARI design is not in~
on Brunswick ARI/RPT system instrument diversity requirement. Paragaph 3 of                              l the ATWS rule requires each' boiling water reactor to have an ARI system that is diverse (from the reactor trip system) from sensor output to the final actuation device. The staff concludes that the Brunswick ARI design is not in~
conformance with the ATWS rule. The pressure and level portions of both the reactor trip system and ARI system, while some. functional diversity exists, use identical- components and are not sufficiently diverse.
conformance with the ATWS rule. The pressure and level portions of both the reactor trip system and ARI system, while some. functional diversity exists, use identical- components and are not sufficiently diverse.

Latest revision as of 02:21, 19 March 2021

Responds to Re Licensee Appeal of NRC Position on Plant ATWS Rod Injection/Recirculation Pump Trip Sys Instrument Diversity Requirement.Atws Rod Injection Design Not in Compliance W/Atws Rule
ML20245D878
Person / Time
Site: Browns Ferry, Brunswick, 05000000
Issue date: 08/08/1988
From: Murley T
Office of Nuclear Reactor Regulation
To: Grace D
BWR OWNERS GROUP, GENERAL PUBLIC UTILITIES CORP.
Shared Package
ML20245D855 List:
References
NUDOCS 8905010209
Download: ML20245D878 (1)
v • d • e


Text

_ - _ - _ _ _ _ - _ - _ _ _ - _ _ _ - - _ _ _ _ _ _ _ - _

ces cJ os ure. 2.

[ *%g* u;:ITED STATES NUCLEAR REGULATORY COMMISSION

'g waspenevow, s.c.seems S

g..... -

4-0 3

AUG 0 81988 Mr. Donald N. Grace, Chaiman 8WR Owner's Group J c/o GPU Nuclear

~1 Upper Pond Road Building E Parsippany, NJ 07054

Dear Mr. Grace:

SU8 JECT: l DIVERSITY REQUIREMENT OF ATWS RULE (10 CFR 50.62)

The purpose of. this letter is to respond to your letter dated June 28, 1988 relating to the Carolina Power & Light Company's appeal of the staff position -

on Brunswick ARI/RPT system instrument diversity requirement. Paragaph 3 of l the ATWS rule requires each' boiling water reactor to have an ARI system that is diverse (from the reactor trip system) from sensor output to the final actuation device. The staff concludes that the Brunswick ARI design is not in~

conformance with the ATWS rule. The pressure and level portions of both the reactor trip system and ARI system, while some. functional diversity exists, use identical- components and are not sufficiently diverse.

The diversity required by the ATWS rule is intended to ensure that coninon mode ,

failures which disable the electrical portion of the existing reactor trip system will not affect the capability of the ARI system to perfom its design functions.

It is recognized that total component / hardware diversity can be difficult to achieve, however licensees are encouraged to provide a maximum effort to satisfy the diversity requirements. A copy of my response to Carolina Power & Light Company's appeal on this issue is attached for your infomation.

Sincerely, oric ...a1 -1.:o !. M1 rhen 1. ..: 1 c ,-

Thomas E. Murley, Director Office of Nuclear Reactor Regulation

Enclosure:

As stated I

cc: L. W. Eury, CP&L 8905010209 890 59 PDR ADOCK O pg P

.

Retrieved from "https://kanterella.com/w/index.php?title=ML20245D878&oldid=3219874"